/* eslint-disable */

/**!
 * Sortable 1.13.0
 * @author	RubaXa   <trash@rubaxa.org>
 * @author	owenm    <owen23355@gmail.com>
 * @license MIT
 */
function _typeof(obj) {
  if (typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol') {
    _typeof = function (obj) {
      return typeof obj
    }
  } else {
    _typeof = function (obj) {
      return obj &&
        typeof Symbol === 'function' &&
        obj.constructor === Symbol &&
        obj !== Symbol.prototype
        ? 'symbol'
        : typeof obj
    }
  }

  return _typeof(obj)
}

function _defineProperty(obj, key, value) {
  if (key in obj) {
    Object.defineProperty(obj, key, {
      value: value,
      enumerable: true,
      configurable: true,
      writable: true,
    })
  } else {
    obj[key] = value
  }

  return obj
}

function _extends() {
  _extends =
    Object.assign ||
    function (target) {
      for (var i = 1; i < arguments.length; i++) {
        var source = arguments[i]

        for (var key in source) {
          if (Object.prototype.hasOwnProperty.call(source, key)) {
            target[key] = source[key]
          }
        }
      }

      return target
    }

  return _extends.apply(this, arguments)
}

function _objectSpread(target) {
  for (var i = 1; i < arguments.length; i++) {
    var source = arguments[i] != null ? arguments[i] : {}
    var ownKeys = Object.keys(source)

    if (typeof Object.getOwnPropertySymbols === 'function') {
      ownKeys = ownKeys.concat(
        Object.getOwnPropertySymbols(source).filter(function (sym) {
          return Object.getOwnPropertyDescriptor(source, sym).enumerable
        }),
      )
    }

    ownKeys.forEach(function (key) {
      _defineProperty(target, key, source[key])
    })
  }

  return target
}

function _objectWithoutPropertiesLoose(source, excluded) {
  if (source == null) return {}
  var target = {}
  var sourceKeys = Object.keys(source)
  var key, i

  for (i = 0; i < sourceKeys.length; i++) {
    key = sourceKeys[i]
    if (excluded.indexOf(key) >= 0) continue
    target[key] = source[key]
  }

  return target
}

function _objectWithoutProperties(source, excluded) {
  if (source == null) return {}

  var target = _objectWithoutPropertiesLoose(source, excluded)

  var key, i

  if (Object.getOwnPropertySymbols) {
    var sourceSymbolKeys = Object.getOwnPropertySymbols(source)

    for (i = 0; i < sourceSymbolKeys.length; i++) {
      key = sourceSymbolKeys[i]
      if (excluded.indexOf(key) >= 0) continue
      if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue
      target[key] = source[key]
    }
  }

  return target
}

function _toConsumableArray(arr) {
  return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _nonIterableSpread()
}

function _arrayWithoutHoles(arr) {
  if (Array.isArray(arr)) {
    for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]

    return arr2
  }
}

function _iterableToArray(iter) {
  if (
    Symbol.iterator in Object(iter) ||
    Object.prototype.toString.call(iter) === '[object Arguments]'
  )
    return Array.from(iter)
}

function _nonIterableSpread() {
  throw new TypeError('Invalid attempt to spread non-iterable instance')
}

var version = '1.13.0'

function userAgent(pattern) {
  if (typeof window !== 'undefined' && window.navigator) {
    return !!(
      /*@__PURE__*/
      navigator.userAgent.match(pattern)
    )
  }
}

var IE11OrLess = userAgent(/(?:Trident.*rv[ :]?11\.|msie|iemobile|Windows Phone)/i)
var Edge = userAgent(/Edge/i)
var FireFox = userAgent(/firefox/i)
var Safari = userAgent(/safari/i) && !userAgent(/chrome/i) && !userAgent(/android/i)
var IOS = userAgent(/iP(ad|od|hone)/i)
var ChromeForAndroid = userAgent(/chrome/i) && userAgent(/android/i)

var captureMode = {
  capture: false,
  passive: false,
}

function on(el, event, fn) {
  el.addEventListener(event, fn, !IE11OrLess && captureMode)
}

function off(el, event, fn) {
  el.removeEventListener(event, fn, !IE11OrLess && captureMode)
}

function matches(
  /**HTMLElement*/
  el,
  /**String*/
  selector,
) {
  if (!selector) return
  selector[0] === '>' && (selector = selector.substring(1))

  if (el) {
    try {
      if (el.matches) {
        return el.matches(selector)
      } else if (el.msMatchesSelector) {
        return el.msMatchesSelector(selector)
      } else if (el.webkitMatchesSelector) {
        return el.webkitMatchesSelector(selector)
      }
    } catch (_) {
      return false
    }
  }

  return false
}

function getParentOrHost(el) {
  return el.host && el !== document && el.host.nodeType ? el.host : el.parentNode
}

function closest(
  /**HTMLElement*/
  el,
  /**String*/
  selector,
  /**HTMLElement*/
  ctx,
  includeCTX,
) {
  if (el) {
    ctx = ctx || document

    do {
      if (
        (selector != null &&
          (selector[0] === '>'
            ? el.parentNode === ctx && matches(el, selector)
            : matches(el, selector))) ||
        (includeCTX && el === ctx)
      ) {
        return el
      }

      if (el === ctx) break
      /* jshint boss:true */
    } while ((el = getParentOrHost(el)))
  }

  return null
}

var R_SPACE = /\s+/g

function toggleClass(el, name, state) {
  if (el && name) {
    if (el.classList) {
      el.classList[state ? 'add' : 'remove'](name)
    } else {
      var className = (' ' + el.className + ' ')
        .replace(R_SPACE, ' ')
        .replace(' ' + name + ' ', ' ')
      el.className = (className + (state ? ' ' + name : '')).replace(R_SPACE, ' ')
    }
  }
}

function css(el, prop, val) {
  var style = el && el.style

  if (style) {
    if (val === void 0) {
      if (document.defaultView && document.defaultView.getComputedStyle) {
        val = document.defaultView.getComputedStyle(el, '')
      } else if (el.currentStyle) {
        val = el.currentStyle
      }

      return prop === void 0 ? val : val[prop]
    } else {
      if (!(prop in style) && prop.indexOf('webkit') === -1) {
        prop = '-webkit-' + prop
      }

      style[prop] = val + (typeof val === 'string' ? '' : 'px')
    }
  }
}

function matrix(el, selfOnly) {
  var appliedTransforms = ''

  if (typeof el === 'string') {
    appliedTransforms = el
  } else {
    do {
      var transform = css(el, 'transform')

      if (transform && transform !== 'none') {
        appliedTransforms = transform + ' ' + appliedTransforms
      }
      /* jshint boss:true */
    } while (!selfOnly && (el = el.parentNode))
  }

  var matrixFn =
    window.DOMMatrix || window.WebKitCSSMatrix || window.CSSMatrix || window.MSCSSMatrix
  /*jshint -W056 */

  return matrixFn && new matrixFn(appliedTransforms)
}

function find(ctx, tagName, iterator) {
  if (ctx) {
    var list = ctx.getElementsByTagName(tagName),
      i = 0,
      n = list.length

    if (iterator) {
      for (; i < n; i++) {
        iterator(list[i], i)
      }
    }

    return list
  }

  return []
}

function getWindowScrollingElement() {
  var scrollingElement = document.scrollingElement

  if (scrollingElement) {
    return scrollingElement
  } else {
    return document.documentElement
  }
}
/**
 * Returns the "bounding client rect" of given element
 * @param  {HTMLElement} el                       The element whose boundingClientRect is wanted
 * @param  {[Boolean]} relativeToContainingBlock  Whether the rect should be relative to the containing block of (including) the container
 * @param  {[Boolean]} relativeToNonStaticParent  Whether the rect should be relative to the relative parent of (including) the contaienr
 * @param  {[Boolean]} undoScale                  Whether the container's scale() should be undone
 * @param  {[HTMLElement]} container              The parent the element will be placed in
 * @return {Object}                               The boundingClientRect of el, with specified adjustments
 */

function getRect(el, relativeToContainingBlock, relativeToNonStaticParent, undoScale, container) {
  if (!el.getBoundingClientRect && el !== window) return
  var elRect, top, left, bottom, right, height, width

  if (el !== window && el.parentNode && el !== getWindowScrollingElement()) {
    elRect = el.getBoundingClientRect()
    top = elRect.top
    left = elRect.left
    bottom = elRect.bottom
    right = elRect.right
    height = elRect.height
    width = elRect.width
  } else {
    top = 0
    left = 0
    bottom = window.innerHeight
    right = window.innerWidth
    height = window.innerHeight
    width = window.innerWidth
  }

  if ((relativeToContainingBlock || relativeToNonStaticParent) && el !== window) {
    // Adjust for translate()
    container = container || el.parentNode // solves #1123 (see: https://stackoverflow.com/a/37953806/6088312)
    // Not needed on <= IE11

    if (!IE11OrLess) {
      do {
        if (
          container &&
          container.getBoundingClientRect &&
          (css(container, 'transform') !== 'none' ||
            (relativeToNonStaticParent && css(container, 'position') !== 'static'))
        ) {
          var containerRect = container.getBoundingClientRect() // Set relative to edges of padding box of container

          top -= containerRect.top + parseInt(css(container, 'border-top-width'))
          left -= containerRect.left + parseInt(css(container, 'border-left-width'))
          bottom = top + elRect.height
          right = left + elRect.width
          break
        }
        /* jshint boss:true */
      } while ((container = container.parentNode))
    }
  }

  if (undoScale && el !== window) {
    // Adjust for scale()
    var elMatrix = matrix(container || el),
      scaleX = elMatrix && elMatrix.a,
      scaleY = elMatrix && elMatrix.d

    if (elMatrix) {
      top /= scaleY
      left /= scaleX
      width /= scaleX
      height /= scaleY
      bottom = top + height
      right = left + width
    }
  }

  return {
    top: top,
    left: left,
    bottom: bottom,
    right: right,
    width: width,
    height: height,
  }
}
/**
 * Checks if a side of an element is scrolled past a side of its parents
 * @param  {HTMLElement}  el           The element who's side being scrolled out of view is in question
 * @param  {String}       elSide       Side of the element in question ('top', 'left', 'right', 'bottom')
 * @param  {String}       parentSide   Side of the parent in question ('top', 'left', 'right', 'bottom')
 * @return {HTMLElement}               The parent scroll element that the el's side is scrolled past, or null if there is no such element
 */

function isScrolledPast(el, elSide, parentSide) {
  var parent = getParentAutoScrollElement(el, true),
    elSideVal = getRect(el)[elSide]
  /* jshint boss:true */

  while (parent) {
    var parentSideVal = getRect(parent)[parentSide],
      visible = void 0

    if (parentSide === 'top' || parentSide === 'left') {
      visible = elSideVal >= parentSideVal
    } else {
      visible = elSideVal <= parentSideVal
    }

    if (!visible) return parent
    if (parent === getWindowScrollingElement()) break
    parent = getParentAutoScrollElement(parent, false)
  }

  return false
}
/**
 * Gets nth child of el, ignoring hidden children, sortable's elements (does not ignore clone if it's visible)
 * and non-draggable elements
 * @param  {HTMLElement} el       The parent element
 * @param  {Number} childNum      The index of the child
 * @param  {Object} options       Parent Sortable's options
 * @return {HTMLElement}          The child at index childNum, or null if not found
 */

function getChild(el, childNum, options) {
  var currentChild = 0,
    i = 0,
    children = el.children

  while (i < children.length) {
    if (
      children[i].style.display !== 'none' &&
      children[i] !== Sortable.ghost &&
      children[i] !== Sortable.dragged &&
      closest(children[i], options.draggable, el, false)
    ) {
      if (currentChild === childNum) {
        return children[i]
      }

      currentChild++
    }

    i++
  }

  return null
}
/**
 * Gets the last child in the el, ignoring ghostEl or invisible elements (clones)
 * @param  {HTMLElement} el       Parent element
 * @param  {selector} selector    Any other elements that should be ignored
 * @return {HTMLElement}          The last child, ignoring ghostEl
 */

function lastChild(el, selector) {
  var last = el.lastElementChild

  while (
    last &&
    (last === Sortable.ghost ||
      css(last, 'display') === 'none' ||
      (selector && !matches(last, selector)))
  ) {
    last = last.previousElementSibling
  }

  return last || null
}
/**
 * Returns the index of an element within its parent for a selected set of
 * elements
 * @param  {HTMLElement} el
 * @param  {selector} selector
 * @return {number}
 */

function index(el, selector) {
  var index = 0

  if (!el || !el.parentNode) {
    return -1
  }
  /* jshint boss:true */

  while ((el = el.previousElementSibling)) {
    if (
      el.nodeName.toUpperCase() !== 'TEMPLATE' &&
      el !== Sortable.clone &&
      (!selector || matches(el, selector))
    ) {
      index++
    }
  }

  return index
}
/**
 * Returns the scroll offset of the given element, added with all the scroll offsets of parent elements.
 * The value is returned in real pixels.
 * @param  {HTMLElement} el
 * @return {Array}             Offsets in the format of [left, top]
 */

function getRelativeScrollOffset(el) {
  var offsetLeft = 0,
    offsetTop = 0,
    winScroller = getWindowScrollingElement()

  if (el) {
    do {
      var elMatrix = matrix(el),
        scaleX = elMatrix.a,
        scaleY = elMatrix.d
      offsetLeft += el.scrollLeft * scaleX
      offsetTop += el.scrollTop * scaleY
    } while (el !== winScroller && (el = el.parentNode))
  }

  return [offsetLeft, offsetTop]
}
/**
 * Returns the index of the object within the given array
 * @param  {Array} arr   Array that may or may not hold the object
 * @param  {Object} obj  An object that has a key-value pair unique to and identical to a key-value pair in the object you want to find
 * @return {Number}      The index of the object in the array, or -1
 */

function indexOfObject(arr, obj) {
  for (var i in arr) {
    if (!arr.hasOwnProperty(i)) continue

    for (var key in obj) {
      if (obj.hasOwnProperty(key) && obj[key] === arr[i][key]) return Number(i)
    }
  }

  return -1
}

function getParentAutoScrollElement(el, includeSelf) {
  // skip to window
  if (!el || !el.getBoundingClientRect) return getWindowScrollingElement()
  var elem = el
  var gotSelf = false

  do {
    // we don't need to get elem css if it isn't even overflowing in the first place (performance)
    if (elem.clientWidth < elem.scrollWidth || elem.clientHeight < elem.scrollHeight) {
      var elemCSS = css(elem)

      if (
        (elem.clientWidth < elem.scrollWidth &&
          (elemCSS.overflowX == 'auto' || elemCSS.overflowX == 'scroll')) ||
        (elem.clientHeight < elem.scrollHeight &&
          (elemCSS.overflowY == 'auto' || elemCSS.overflowY == 'scroll'))
      ) {
        if (!elem.getBoundingClientRect || elem === document.body)
          return getWindowScrollingElement()
        if (gotSelf || includeSelf) return elem
        gotSelf = true
      }
    }
    /* jshint boss:true */
  } while ((elem = elem.parentNode))

  return getWindowScrollingElement()
}

function extend(dst, src) {
  if (dst && src) {
    for (var key in src) {
      if (src.hasOwnProperty(key)) {
        dst[key] = src[key]
      }
    }
  }

  return dst
}

function isRectEqual(rect1, rect2) {
  return (
    Math.round(rect1.top) === Math.round(rect2.top) &&
    Math.round(rect1.left) === Math.round(rect2.left) &&
    Math.round(rect1.height) === Math.round(rect2.height) &&
    Math.round(rect1.width) === Math.round(rect2.width)
  )
}

var _throttleTimeout

function throttle(callback, ms) {
  return function () {
    if (!_throttleTimeout) {
      var args = arguments,
        _this = this

      if (args.length === 1) {
        callback.call(_this, args[0])
      } else {
        callback.apply(_this, args)
      }

      _throttleTimeout = setTimeout(function () {
        _throttleTimeout = void 0
      }, ms)
    }
  }
}

function cancelThrottle() {
  clearTimeout(_throttleTimeout)
  _throttleTimeout = void 0
}

function scrollBy(el, x, y) {
  el.scrollLeft += x
  el.scrollTop += y
}

function clone(el) {
  var Polymer = window.Polymer
  var $ = window.jQuery || window.Zepto

  if (Polymer && Polymer.dom) {
    return Polymer.dom(el).cloneNode(true)
  } else if ($) {
    return $(el).clone(true)[0]
  } else {
    return el.cloneNode(true)
  }
}

function setRect(el, rect) {
  css(el, 'position', 'absolute')
  css(el, 'top', rect.top)
  css(el, 'left', rect.left)
  css(el, 'width', rect.width)
  css(el, 'height', rect.height)
}

function unsetRect(el) {
  css(el, 'position', '')
  css(el, 'top', '')
  css(el, 'left', '')
  css(el, 'width', '')
  css(el, 'height', '')
}

var expando = 'Sortable' + new Date().getTime()

function AnimationStateManager() {
  var animationStates = [],
    animationCallbackId
  return {
    captureAnimationState: function captureAnimationState() {
      animationStates = []
      if (!this.options.animation) return
      var children = [].slice.call(this.el.children)
      children.forEach(function (child) {
        if (css(child, 'display') === 'none' || child === Sortable.ghost) return
        animationStates.push({
          target: child,
          rect: getRect(child),
        })

        var fromRect = _objectSpread({}, animationStates[animationStates.length - 1].rect) // If animating: compensate for current animation

        if (child.thisAnimationDuration) {
          var childMatrix = matrix(child, true)

          if (childMatrix) {
            fromRect.top -= childMatrix.f
            fromRect.left -= childMatrix.e
          }
        }

        child.fromRect = fromRect
      })
    },
    addAnimationState: function addAnimationState(state) {
      animationStates.push(state)
    },
    removeAnimationState: function removeAnimationState(target) {
      animationStates.splice(
        indexOfObject(animationStates, {
          target: target,
        }),
        1,
      )
    },
    animateAll: function animateAll(callback) {
      var _this = this

      if (!this.options.animation) {
        clearTimeout(animationCallbackId)
        if (typeof callback === 'function') callback()
        return
      }

      var animating = false,
        animationTime = 0
      animationStates.forEach(function (state) {
        var time = 0,
          target = state.target,
          fromRect = target.fromRect,
          toRect = getRect(target),
          prevFromRect = target.prevFromRect,
          prevToRect = target.prevToRect,
          animatingRect = state.rect,
          targetMatrix = matrix(target, true)

        if (targetMatrix) {
          // Compensate for current animation
          toRect.top -= targetMatrix.f
          toRect.left -= targetMatrix.e
        }

        target.toRect = toRect

        if (target.thisAnimationDuration) {
          // Could also check if animatingRect is between fromRect and toRect
          if (
            isRectEqual(prevFromRect, toRect) &&
            !isRectEqual(fromRect, toRect) && // Make sure animatingRect is on line between toRect & fromRect
            (animatingRect.top - toRect.top) / (animatingRect.left - toRect.left) ===
              (fromRect.top - toRect.top) / (fromRect.left - toRect.left)
          ) {
            // If returning to same place as started from animation and on same axis
            time = calculateRealTime(animatingRect, prevFromRect, prevToRect, _this.options)
          }
        } // if fromRect != toRect: animate

        if (!isRectEqual(toRect, fromRect)) {
          target.prevFromRect = fromRect
          target.prevToRect = toRect

          if (!time) {
            time = _this.options.animation
          }

          _this.animate(target, animatingRect, toRect, time)
        }

        if (time) {
          animating = true
          animationTime = Math.max(animationTime, time)
          clearTimeout(target.animationResetTimer)
          target.animationResetTimer = setTimeout(function () {
            target.animationTime = 0
            target.prevFromRect = null
            target.fromRect = null
            target.prevToRect = null
            target.thisAnimationDuration = null
          }, time)
          target.thisAnimationDuration = time
        }
      })
      clearTimeout(animationCallbackId)

      if (!animating) {
        if (typeof callback === 'function') callback()
      } else {
        animationCallbackId = setTimeout(function () {
          if (typeof callback === 'function') callback()
        }, animationTime)
      }

      animationStates = []
    },
    animate: function animate(target, currentRect, toRect, duration) {
      if (duration) {
        css(target, 'transition', '')
        css(target, 'transform', '')
        var elMatrix = matrix(this.el),
          scaleX = elMatrix && elMatrix.a,
          scaleY = elMatrix && elMatrix.d,
          translateX = (currentRect.left - toRect.left) / (scaleX || 1),
          translateY = (currentRect.top - toRect.top) / (scaleY || 1)
        target.animatingX = !!translateX
        target.animatingY = !!translateY
        css(target, 'transform', 'translate3d(' + translateX + 'px,' + translateY + 'px,0)')
        this.forRepaintDummy = repaint(target) // repaint

        css(
          target,
          'transition',
          'transform ' + duration + 'ms' + (this.options.easing ? ' ' + this.options.easing : ''),
        )
        css(target, 'transform', 'translate3d(0,0,0)')
        typeof target.animated === 'number' && clearTimeout(target.animated)
        target.animated = setTimeout(function () {
          css(target, 'transition', '')
          css(target, 'transform', '')
          target.animated = false
          target.animatingX = false
          target.animatingY = false
        }, duration)
      }
    },
  }
}

function repaint(target) {
  return target.offsetWidth
}

function calculateRealTime(animatingRect, fromRect, toRect, options) {
  return (
    (Math.sqrt(
      Math.pow(fromRect.top - animatingRect.top, 2) +
        Math.pow(fromRect.left - animatingRect.left, 2),
    ) /
      Math.sqrt(
        Math.pow(fromRect.top - toRect.top, 2) + Math.pow(fromRect.left - toRect.left, 2),
      )) *
    options.animation
  )
}

var plugins = []
var defaults = {
  initializeByDefault: true,
}
var PluginManager = {
  mount: function mount(plugin) {
    // Set default static properties
    for (var option in defaults) {
      if (defaults.hasOwnProperty(option) && !(option in plugin)) {
        plugin[option] = defaults[option]
      }
    }

    plugins.forEach(function (p) {
      if (p.pluginName === plugin.pluginName) {
        throw 'Sortable: Cannot mount plugin '.concat(plugin.pluginName, ' more than once')
      }
    })
    plugins.push(plugin)
  },
  pluginEvent: function pluginEvent(eventName, sortable, evt) {
    var _this = this

    this.eventCanceled = false

    evt.cancel = function () {
      _this.eventCanceled = true
    }

    var eventNameGlobal = eventName + 'Global'
    plugins.forEach(function (plugin) {
      if (!sortable[plugin.pluginName]) return // Fire global events if it exists in this sortable

      if (sortable[plugin.pluginName][eventNameGlobal]) {
        sortable[plugin.pluginName][eventNameGlobal](
          _objectSpread(
            {
              sortable: sortable,
            },
            evt,
          ),
        )
      } // Only fire plugin event if plugin is enabled in this sortable,
      // and plugin has event defined

      if (sortable.options[plugin.pluginName] && sortable[plugin.pluginName][eventName]) {
        sortable[plugin.pluginName][eventName](
          _objectSpread(
            {
              sortable: sortable,
            },
            evt,
          ),
        )
      }
    })
  },
  initializePlugins: function initializePlugins(sortable, el, defaults, options) {
    plugins.forEach(function (plugin) {
      var pluginName = plugin.pluginName
      if (!sortable.options[pluginName] && !plugin.initializeByDefault) return
      var initialized = new plugin(sortable, el, sortable.options)
      initialized.sortable = sortable
      initialized.options = sortable.options
      sortable[pluginName] = initialized // Add default options from plugin

      _extends(defaults, initialized.defaults)
    })

    for (var option in sortable.options) {
      if (!sortable.options.hasOwnProperty(option)) continue
      var modified = this.modifyOption(sortable, option, sortable.options[option])

      if (typeof modified !== 'undefined') {
        sortable.options[option] = modified
      }
    }
  },
  getEventProperties: function getEventProperties(name, sortable) {
    var eventProperties = {}
    plugins.forEach(function (plugin) {
      if (typeof plugin.eventProperties !== 'function') return

      _extends(eventProperties, plugin.eventProperties.call(sortable[plugin.pluginName], name))
    })
    return eventProperties
  },
  modifyOption: function modifyOption(sortable, name, value) {
    var modifiedValue
    plugins.forEach(function (plugin) {
      // Plugin must exist on the Sortable
      if (!sortable[plugin.pluginName]) return // If static option listener exists for this option, call in the context of the Sortable's instance of this plugin

      if (plugin.optionListeners && typeof plugin.optionListeners[name] === 'function') {
        modifiedValue = plugin.optionListeners[name].call(sortable[plugin.pluginName], value)
      }
    })
    return modifiedValue
  },
}

function dispatchEvent(_ref) {
  var sortable = _ref.sortable,
    rootEl = _ref.rootEl,
    name = _ref.name,
    targetEl = _ref.targetEl,
    cloneEl = _ref.cloneEl,
    toEl = _ref.toEl,
    fromEl = _ref.fromEl,
    oldIndex = _ref.oldIndex,
    newIndex = _ref.newIndex,
    oldDraggableIndex = _ref.oldDraggableIndex,
    newDraggableIndex = _ref.newDraggableIndex,
    originalEvent = _ref.originalEvent,
    putSortable = _ref.putSortable,
    extraEventProperties = _ref.extraEventProperties
  sortable = sortable || (rootEl && rootEl[expando])
  if (!sortable) return
  var evt,
    options = sortable.options,
    onName = 'on' + name.charAt(0).toUpperCase() + name.substr(1) // Support for new CustomEvent feature

  if (window.CustomEvent && !IE11OrLess && !Edge) {
    evt = new CustomEvent(name, {
      bubbles: true,
      cancelable: true,
    })
  } else {
    evt = document.createEvent('Event')
    evt.initEvent(name, true, true)
  }

  evt.to = toEl || rootEl
  evt.from = fromEl || rootEl
  evt.item = targetEl || rootEl
  evt.clone = cloneEl
  evt.oldIndex = oldIndex
  evt.newIndex = newIndex
  evt.oldDraggableIndex = oldDraggableIndex
  evt.newDraggableIndex = newDraggableIndex
  evt.originalEvent = originalEvent
  evt.pullMode = putSortable ? putSortable.lastPutMode : undefined

  var allEventProperties = _objectSpread(
    {},
    extraEventProperties,
    PluginManager.getEventProperties(name, sortable),
  )

  for (var option in allEventProperties) {
    evt[option] = allEventProperties[option]
  }

  if (rootEl) {
    rootEl.dispatchEvent(evt)
  }

  if (options[onName]) {
    options[onName].call(sortable, evt)
  }
}

var pluginEvent = function pluginEvent(eventName, sortable) {
  var _ref = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {},
    originalEvent = _ref.evt,
    data = _objectWithoutProperties(_ref, ['evt'])

  PluginManager.pluginEvent.bind(Sortable)(
    eventName,
    sortable,
    _objectSpread(
      {
        dragEl: dragEl,
        parentEl: parentEl,
        ghostEl: ghostEl,
        rootEl: rootEl,
        nextEl: nextEl,
        lastDownEl: lastDownEl,
        cloneEl: cloneEl,
        cloneHidden: cloneHidden,
        dragStarted: moved,
        putSortable: putSortable,
        activeSortable: Sortable.active,
        originalEvent: originalEvent,
        oldIndex: oldIndex,
        oldDraggableIndex: oldDraggableIndex,
        newIndex: newIndex,
        newDraggableIndex: newDraggableIndex,
        hideGhostForTarget: _hideGhostForTarget,
        unhideGhostForTarget: _unhideGhostForTarget,
        cloneNowHidden: function cloneNowHidden() {
          cloneHidden = true
        },
        cloneNowShown: function cloneNowShown() {
          cloneHidden = false
        },
        dispatchSortableEvent: function dispatchSortableEvent(name) {
          _dispatchEvent({
            sortable: sortable,
            name: name,
            originalEvent: originalEvent,
          })
        },
      },
      data,
    ),
  )
}

function _dispatchEvent(info) {
  dispatchEvent(
    _objectSpread(
      {
        putSortable: putSortable,
        cloneEl: cloneEl,
        targetEl: dragEl,
        rootEl: rootEl,
        oldIndex: oldIndex,
        oldDraggableIndex: oldDraggableIndex,
        newIndex: newIndex,
        newDraggableIndex: newDraggableIndex,
      },
      info,
    ),
  )
}

var dragEl,
  parentEl,
  ghostEl,
  rootEl,
  nextEl,
  lastDownEl,
  cloneEl,
  cloneHidden,
  oldIndex,
  newIndex,
  oldDraggableIndex,
  newDraggableIndex,
  activeGroup,
  putSortable,
  awaitingDragStarted = false,
  ignoreNextClick = false,
  sortables = [],
  tapEvt,
  touchEvt,
  lastDx,
  lastDy,
  tapDistanceLeft,
  tapDistanceTop,
  moved,
  lastTarget,
  lastDirection,
  pastFirstInvertThresh = false,
  isCircumstantialInvert = false,
  targetMoveDistance,
  // For positioning ghost absolutely
  ghostRelativeParent,
  ghostRelativeParentInitialScroll = [],
  // (left, top)
  _silent = false,
  savedInputChecked = []
/** @const */

var documentExists = typeof document !== 'undefined',
  PositionGhostAbsolutely = IOS,
  CSSFloatProperty = Edge || IE11OrLess ? 'cssFloat' : 'float',
  // This will not pass for IE9, because IE9 DnD only works on anchors
  supportDraggable =
    documentExists && !ChromeForAndroid && !IOS && 'draggable' in document.createElement('div'),
  supportCssPointerEvents = (function () {
    if (!documentExists) return // false when <= IE11

    if (IE11OrLess) {
      return false
    }

    var el = document.createElement('x')
    el.style.cssText = 'pointer-events:auto'
    return el.style.pointerEvents === 'auto'
  })(),
  _detectDirection = function _detectDirection(el, options) {
    var elCSS = css(el),
      elWidth =
        parseInt(elCSS.width) -
        parseInt(elCSS.paddingLeft) -
        parseInt(elCSS.paddingRight) -
        parseInt(elCSS.borderLeftWidth) -
        parseInt(elCSS.borderRightWidth),
      child1 = getChild(el, 0, options),
      child2 = getChild(el, 1, options),
      firstChildCSS = child1 && css(child1),
      secondChildCSS = child2 && css(child2),
      firstChildWidth =
        firstChildCSS &&
        parseInt(firstChildCSS.marginLeft) +
          parseInt(firstChildCSS.marginRight) +
          getRect(child1).width,
      secondChildWidth =
        secondChildCSS &&
        parseInt(secondChildCSS.marginLeft) +
          parseInt(secondChildCSS.marginRight) +
          getRect(child2).width

    if (elCSS.display === 'flex') {
      return elCSS.flexDirection === 'column' || elCSS.flexDirection === 'column-reverse'
        ? 'vertical'
        : 'horizontal'
    }

    if (elCSS.display === 'grid') {
      return elCSS.gridTemplateColumns.split(' ').length <= 1 ? 'vertical' : 'horizontal'
    }

    if (child1 && firstChildCSS['float'] && firstChildCSS['float'] !== 'none') {
      var touchingSideChild2 = firstChildCSS['float'] === 'left' ? 'left' : 'right'
      return child2 &&
        (secondChildCSS.clear === 'both' || secondChildCSS.clear === touchingSideChild2)
        ? 'vertical'
        : 'horizontal'
    }

    return child1 &&
      (firstChildCSS.display === 'block' ||
        firstChildCSS.display === 'flex' ||
        firstChildCSS.display === 'table' ||
        firstChildCSS.display === 'grid' ||
        (firstChildWidth >= elWidth && elCSS[CSSFloatProperty] === 'none') ||
        (child2 &&
          elCSS[CSSFloatProperty] === 'none' &&
          firstChildWidth + secondChildWidth > elWidth))
      ? 'vertical'
      : 'horizontal'
  },
  _dragElInRowColumn = function _dragElInRowColumn(dragRect, targetRect, vertical) {
    var dragElS1Opp = vertical ? dragRect.left : dragRect.top,
      dragElS2Opp = vertical ? dragRect.right : dragRect.bottom,
      dragElOppLength = vertical ? dragRect.width : dragRect.height,
      targetS1Opp = vertical ? targetRect.left : targetRect.top,
      targetS2Opp = vertical ? targetRect.right : targetRect.bottom,
      targetOppLength = vertical ? targetRect.width : targetRect.height
    return (
      dragElS1Opp === targetS1Opp ||
      dragElS2Opp === targetS2Opp ||
      dragElS1Opp + dragElOppLength / 2 === targetS1Opp + targetOppLength / 2
    )
  },
  /**
   * Detects first nearest empty sortable to X and Y position using emptyInsertThreshold.
   * @param  {Number} x      X position
   * @param  {Number} y      Y position
   * @return {HTMLElement}   Element of the first found nearest Sortable
   */
  _detectNearestEmptySortable = function _detectNearestEmptySortable(x, y) {
    var ret
    sortables.some(function (sortable) {
      if (lastChild(sortable)) return
      var rect = getRect(sortable),
        threshold = sortable[expando].options.emptyInsertThreshold,
        insideHorizontally = x >= rect.left - threshold && x <= rect.right + threshold,
        insideVertically = y >= rect.top - threshold && y <= rect.bottom + threshold

      if (threshold && insideHorizontally && insideVertically) {
        return (ret = sortable)
      }
    })
    return ret
  },
  _prepareGroup = function _prepareGroup(options) {
    function toFn(value, pull) {
      return function (to, from, dragEl, evt) {
        var sameGroup =
          to.options.group.name &&
          from.options.group.name &&
          to.options.group.name === from.options.group.name

        if (value == null && (pull || sameGroup)) {
          // Default pull value
          // Default pull and put value if same group
          return true
        } else if (value == null || value === false) {
          return false
        } else if (pull && value === 'clone') {
          return value
        } else if (typeof value === 'function') {
          return toFn(value(to, from, dragEl, evt), pull)(to, from, dragEl, evt)
        } else {
          var otherGroup = (pull ? to : from).options.group.name
          return (
            value === true ||
            (typeof value === 'string' && value === otherGroup) ||
            (value.join && value.indexOf(otherGroup) > -1)
          )
        }
      }
    }

    var group = {}
    var originalGroup = options.group

    if (!originalGroup || _typeof(originalGroup) != 'object') {
      originalGroup = {
        name: originalGroup,
      }
    }

    group.name = originalGroup.name
    group.checkPull = toFn(originalGroup.pull, true)
    group.checkPut = toFn(originalGroup.put)
    group.revertClone = originalGroup.revertClone
    options.group = group
  },
  _hideGhostForTarget = function _hideGhostForTarget() {
    if (!supportCssPointerEvents && ghostEl) {
      css(ghostEl, 'display', 'none')
    }
  },
  _unhideGhostForTarget = function _unhideGhostForTarget() {
    if (!supportCssPointerEvents && ghostEl) {
      css(ghostEl, 'display', '')
    }
  } // #1184 fix - Prevent click event on fallback if dragged but item not changed position

if (documentExists) {
  document.addEventListener(
    'click',
    function (evt) {
      if (ignoreNextClick) {
        evt.preventDefault()
        evt.stopPropagation && evt.stopPropagation()
        evt.stopImmediatePropagation && evt.stopImmediatePropagation()
        ignoreNextClick = false
        return false
      }
    },
    true,
  )
}

var nearestEmptyInsertDetectEvent = function nearestEmptyInsertDetectEvent(evt) {
  if (dragEl) {
    evt = evt.touches ? evt.touches[0] : evt

    var nearest = _detectNearestEmptySortable(evt.clientX, evt.clientY)

    if (nearest) {
      // Create imitation event
      var event = {}

      for (var i in evt) {
        if (evt.hasOwnProperty(i)) {
          event[i] = evt[i]
        }
      }

      event.target = event.rootEl = nearest
      event.preventDefault = void 0
      event.stopPropagation = void 0

      nearest[expando]._onDragOver(event)
    }
  }
}

var _checkOutsideTargetEl = function _checkOutsideTargetEl(evt) {
  if (dragEl) {
    dragEl.parentNode[expando]._isOutsideThisEl(evt.target)
  }
}
/**
 * @class  Sortable
 * @param  {HTMLElement}  el
 * @param  {Object}       [options]
 */

function Sortable(el, options) {
  if (!(el && el.nodeType && el.nodeType === 1)) {
    throw 'Sortable: `el` must be an HTMLElement, not '.concat({}.toString.call(el))
  }

  this.el = el // root element

  this.options = options = _extends({}, options) // Export instance

  el[expando] = this
  var defaults = {
    group: null,
    sort: true,
    disabled: false,
    store: null,
    handle: null,
    draggable: /^[uo]l$/i.test(el.nodeName) ? '>li' : '>*',
    swapThreshold: 1,
    // percentage; 0 <= x <= 1
    invertSwap: false,
    // invert always
    invertedSwapThreshold: null,
    // will be set to same as swapThreshold if default
    removeCloneOnHide: true,
    direction: function direction() {
      return _detectDirection(el, this.options)
    },
    ghostClass: 'sortable-ghost',
    chosenClass: 'sortable-chosen',
    dragClass: 'sortable-drag',
    ignore: 'a, img',
    filter: null,
    preventOnFilter: true,
    animation: 0,
    easing: null,
    setData: function setData(dataTransfer, dragEl) {
      dataTransfer.setData('Text', dragEl.textContent)
    },
    dropBubble: false,
    dragoverBubble: false,
    dataIdAttr: 'data-id',
    delay: 0,
    delayOnTouchOnly: false,
    touchStartThreshold:
      (Number.parseInt ? Number : window).parseInt(window.devicePixelRatio, 10) || 1,
    forceFallback: false,
    fallbackClass: 'sortable-fallback',
    fallbackOnBody: false,
    fallbackTolerance: 0,
    fallbackOffset: {
      x: 0,
      y: 0,
    },
    supportPointer: Sortable.supportPointer !== false && 'PointerEvent' in window && !Safari,
    emptyInsertThreshold: 5,
  }
  PluginManager.initializePlugins(this, el, defaults) // Set default options

  for (var name in defaults) {
    !(name in options) && (options[name] = defaults[name])
  }

  _prepareGroup(options) // Bind all private methods

  for (var fn in this) {
    if (fn.charAt(0) === '_' && typeof this[fn] === 'function') {
      this[fn] = this[fn].bind(this)
    }
  } // Setup drag mode

  this.nativeDraggable = options.forceFallback ? false : supportDraggable

  if (this.nativeDraggable) {
    // Touch start threshold cannot be greater than the native dragstart threshold
    this.options.touchStartThreshold = 1
  } // Bind events

  if (options.supportPointer) {
    on(el, 'pointerdown', this._onTapStart)
  } else {
    on(el, 'mousedown', this._onTapStart)
    on(el, 'touchstart', this._onTapStart)
  }

  if (this.nativeDraggable) {
    on(el, 'dragover', this)
    on(el, 'dragenter', this)
  }

  sortables.push(this.el) // Restore sorting

  options.store && options.store.get && this.sort(options.store.get(this) || []) // Add animation state manager

  _extends(this, AnimationStateManager())
}

Sortable.prototype =
  /** @lends Sortable.prototype */
  {
    constructor: Sortable,
    _isOutsideThisEl: function _isOutsideThisEl(target) {
      if (!this.el.contains(target) && target !== this.el) {
        lastTarget = null
      }
    },
    _getDirection: function _getDirection(evt, target) {
      return typeof this.options.direction === 'function'
        ? this.options.direction.call(this, evt, target, dragEl)
        : this.options.direction
    },
    _onTapStart: function _onTapStart(
      /** Event|TouchEvent */
      evt,
    ) {
      if (!evt.cancelable) return

      var _this = this,
        el = this.el,
        options = this.options,
        preventOnFilter = options.preventOnFilter,
        type = evt.type,
        touch =
          (evt.touches && evt.touches[0]) ||
          (evt.pointerType && evt.pointerType === 'touch' && evt),
        target = (touch || evt).target,
        originalTarget =
          (evt.target.shadowRoot &&
            ((evt.path && evt.path[0]) || (evt.composedPath && evt.composedPath()[0]))) ||
          target,
        filter = options.filter

      _saveInputCheckedState(el) // Don't trigger start event when an element is been dragged, otherwise the evt.oldindex always wrong when set option.group.

      if (dragEl) {
        return
      }

      if ((/mousedown|pointerdown/.test(type) && evt.button !== 0) || options.disabled) {
        return // only left button and enabled
      } // cancel dnd if original target is content editable

      if (originalTarget.isContentEditable) {
        return
      } // Safari ignores further event handling after mousedown

      if (!this.nativeDraggable && Safari && target && target.tagName.toUpperCase() === 'SELECT') {
        return
      }

      target = closest(target, options.draggable, el, false)

      if (target && target.animated) {
        return
      }

      if (lastDownEl === target) {
        // Ignoring duplicate `down`
        return
      } // Get the index of the dragged element within its parent

      oldIndex = index(target)
      oldDraggableIndex = index(target, options.draggable) // Check filter

      if (typeof filter === 'function') {
        if (filter.call(this, evt, target, this)) {
          _dispatchEvent({
            sortable: _this,
            rootEl: originalTarget,
            name: 'filter',
            targetEl: target,
            toEl: el,
            fromEl: el,
          })

          pluginEvent('filter', _this, {
            evt: evt,
          })
          preventOnFilter && evt.cancelable && evt.preventDefault()
          return // cancel dnd
        }
      } else if (filter) {
        filter = filter.split(',').some(function (criteria) {
          criteria = closest(originalTarget, criteria.trim(), el, false)

          if (criteria) {
            _dispatchEvent({
              sortable: _this,
              rootEl: criteria,
              name: 'filter',
              targetEl: target,
              fromEl: el,
              toEl: el,
            })

            pluginEvent('filter', _this, {
              evt: evt,
            })
            return true
          }
        })

        if (filter) {
          preventOnFilter && evt.cancelable && evt.preventDefault()
          return // cancel dnd
        }
      }

      if (options.handle && !closest(originalTarget, options.handle, el, false)) {
        return
      } // Prepare `dragstart`

      this._prepareDragStart(evt, touch, target)
    },
    _prepareDragStart: function _prepareDragStart(
      /** Event */
      evt,
      /** Touch */
      touch,
      /** HTMLElement */
      target,
    ) {
      var _this = this,
        el = _this.el,
        options = _this.options,
        ownerDocument = el.ownerDocument,
        dragStartFn

      if (target && !dragEl && target.parentNode === el) {
        var dragRect = getRect(target)
        rootEl = el
        dragEl = target
        parentEl = dragEl.parentNode
        nextEl = dragEl.nextSibling
        lastDownEl = target
        activeGroup = options.group
        Sortable.dragged = dragEl
        tapEvt = {
          target: dragEl,
          clientX: (touch || evt).clientX,
          clientY: (touch || evt).clientY,
        }
        tapDistanceLeft = tapEvt.clientX - dragRect.left
        tapDistanceTop = tapEvt.clientY - dragRect.top
        this._lastX = (touch || evt).clientX
        this._lastY = (touch || evt).clientY
        dragEl.style['will-change'] = 'all'

        dragStartFn = function dragStartFn() {
          pluginEvent('delayEnded', _this, {
            evt: evt,
          })

          if (Sortable.eventCanceled) {
            _this._onDrop()

            return
          } // Delayed drag has been triggered
          // we can re-enable the events: touchmove/mousemove

          _this._disableDelayedDragEvents()

          if (!FireFox && _this.nativeDraggable) {
            dragEl.draggable = true
          } // Bind the events: dragstart/dragend

          _this._triggerDragStart(evt, touch) // Drag start event

          _dispatchEvent({
            sortable: _this,
            name: 'choose',
            originalEvent: evt,
          }) // Chosen item

          toggleClass(dragEl, options.chosenClass, true)
        } // Disable "draggable"

        options.ignore.split(',').forEach(function (criteria) {
          find(dragEl, criteria.trim(), _disableDraggable)
        })
        on(ownerDocument, 'dragover', nearestEmptyInsertDetectEvent)
        on(ownerDocument, 'mousemove', nearestEmptyInsertDetectEvent)
        on(ownerDocument, 'touchmove', nearestEmptyInsertDetectEvent)
        on(ownerDocument, 'mouseup', _this._onDrop)
        on(ownerDocument, 'touchend', _this._onDrop)
        on(ownerDocument, 'touchcancel', _this._onDrop) // Make dragEl draggable (must be before delay for FireFox)

        if (FireFox && this.nativeDraggable) {
          this.options.touchStartThreshold = 4
          dragEl.draggable = true
        }

        pluginEvent('delayStart', this, {
          evt: evt,
        }) // Delay is impossible for native DnD in Edge or IE

        if (
          options.delay &&
          (!options.delayOnTouchOnly || touch) &&
          (!this.nativeDraggable || !(Edge || IE11OrLess))
        ) {
          if (Sortable.eventCanceled) {
            this._onDrop()

            return
          } // If the user moves the pointer or let go the click or touch
          // before the delay has been reached:
          // disable the delayed drag

          on(ownerDocument, 'mouseup', _this._disableDelayedDrag)
          on(ownerDocument, 'touchend', _this._disableDelayedDrag)
          on(ownerDocument, 'touchcancel', _this._disableDelayedDrag)
          on(ownerDocument, 'mousemove', _this._delayedDragTouchMoveHandler)
          on(ownerDocument, 'touchmove', _this._delayedDragTouchMoveHandler)
          options.supportPointer &&
            on(ownerDocument, 'pointermove', _this._delayedDragTouchMoveHandler)
          _this._dragStartTimer = setTimeout(dragStartFn, options.delay)
        } else {
          dragStartFn()
        }
      }
    },
    _delayedDragTouchMoveHandler: function _delayedDragTouchMoveHandler(
      /** TouchEvent|PointerEvent **/
      e,
    ) {
      var touch = e.touches ? e.touches[0] : e

      if (
        Math.max(Math.abs(touch.clientX - this._lastX), Math.abs(touch.clientY - this._lastY)) >=
        Math.floor(
          this.options.touchStartThreshold /
            ((this.nativeDraggable && window.devicePixelRatio) || 1),
        )
      ) {
        this._disableDelayedDrag()
      }
    },
    _disableDelayedDrag: function _disableDelayedDrag() {
      dragEl && _disableDraggable(dragEl)
      clearTimeout(this._dragStartTimer)

      this._disableDelayedDragEvents()
    },
    _disableDelayedDragEvents: function _disableDelayedDragEvents() {
      var ownerDocument = this.el.ownerDocument
      off(ownerDocument, 'mouseup', this._disableDelayedDrag)
      off(ownerDocument, 'touchend', this._disableDelayedDrag)
      off(ownerDocument, 'touchcancel', this._disableDelayedDrag)
      off(ownerDocument, 'mousemove', this._delayedDragTouchMoveHandler)
      off(ownerDocument, 'touchmove', this._delayedDragTouchMoveHandler)
      off(ownerDocument, 'pointermove', this._delayedDragTouchMoveHandler)
    },
    _triggerDragStart: function _triggerDragStart(
      /** Event */
      evt,
      /** Touch */
      touch,
    ) {
      touch = touch || (evt.pointerType == 'touch' && evt)

      if (!this.nativeDraggable || touch) {
        if (this.options.supportPointer) {
          on(document, 'pointermove', this._onTouchMove)
        } else if (touch) {
          on(document, 'touchmove', this._onTouchMove)
        } else {
          on(document, 'mousemove', this._onTouchMove)
        }
      } else {
        on(dragEl, 'dragend', this)
        on(rootEl, 'dragstart', this._onDragStart)
      }

      try {
        if (document.selection) {
          // Timeout neccessary for IE9
          _nextTick(function () {
            document.selection.empty()
          })
        } else {
          window.getSelection().removeAllRanges()
        }
      } catch (err) {}
    },
    _dragStarted: function _dragStarted(fallback, evt) {
      awaitingDragStarted = false

      if (rootEl && dragEl) {
        pluginEvent('dragStarted', this, {
          evt: evt,
        })

        if (this.nativeDraggable) {
          on(document, 'dragover', _checkOutsideTargetEl)
        }

        var options = this.options // Apply effect

        !fallback && toggleClass(dragEl, options.dragClass, false)
        toggleClass(dragEl, options.ghostClass, true)
        Sortable.active = this
        fallback && this._appendGhost() // Drag start event

        _dispatchEvent({
          sortable: this,
          name: 'start',
          originalEvent: evt,
        })
      } else {
        this._nulling()
      }
    },
    _emulateDragOver: function _emulateDragOver() {
      if (touchEvt) {
        this._lastX = touchEvt.clientX
        this._lastY = touchEvt.clientY

        _hideGhostForTarget()

        var target = document.elementFromPoint(touchEvt.clientX, touchEvt.clientY)
        var parent = target

        while (target && target.shadowRoot) {
          target = target.shadowRoot.elementFromPoint(touchEvt.clientX, touchEvt.clientY)
          if (target === parent) break
          parent = target
        }

        dragEl.parentNode[expando]._isOutsideThisEl(target)

        if (parent) {
          do {
            if (parent[expando]) {
              var inserted = void 0
              inserted = parent[expando]._onDragOver({
                clientX: touchEvt.clientX,
                clientY: touchEvt.clientY,
                target: target,
                rootEl: parent,
              })

              if (inserted && !this.options.dragoverBubble) {
                break
              }
            }

            target = parent // store last element
          } while (
            /* jshint boss:true */
            (parent = parent.parentNode)
          )
        }

        _unhideGhostForTarget()
      }
    },
    _onTouchMove: function _onTouchMove(
      /**TouchEvent*/
      evt,
    ) {
      if (tapEvt) {
        var options = this.options,
          fallbackTolerance = options.fallbackTolerance,
          fallbackOffset = options.fallbackOffset,
          touch = evt.touches ? evt.touches[0] : evt,
          ghostMatrix = ghostEl && matrix(ghostEl, true),
          scaleX = ghostEl && ghostMatrix && ghostMatrix.a,
          scaleY = ghostEl && ghostMatrix && ghostMatrix.d,
          relativeScrollOffset =
            PositionGhostAbsolutely &&
            ghostRelativeParent &&
            getRelativeScrollOffset(ghostRelativeParent),
          dx =
            (touch.clientX - tapEvt.clientX + fallbackOffset.x) / (scaleX || 1) +
            (relativeScrollOffset
              ? relativeScrollOffset[0] - ghostRelativeParentInitialScroll[0]
              : 0) /
              (scaleX || 1),
          dy =
            (touch.clientY - tapEvt.clientY + fallbackOffset.y) / (scaleY || 1) +
            (relativeScrollOffset
              ? relativeScrollOffset[1] - ghostRelativeParentInitialScroll[1]
              : 0) /
              (scaleY || 1) // only set the status to dragging, when we are actually dragging

        if (!Sortable.active && !awaitingDragStarted) {
          if (
            fallbackTolerance &&
            Math.max(Math.abs(touch.clientX - this._lastX), Math.abs(touch.clientY - this._lastY)) <
              fallbackTolerance
          ) {
            return
          }

          this._onDragStart(evt, true)
        }

        if (ghostEl) {
          if (ghostMatrix) {
            ghostMatrix.e += dx - (lastDx || 0)
            ghostMatrix.f += dy - (lastDy || 0)
          } else {
            ghostMatrix = {
              a: 1,
              b: 0,
              c: 0,
              d: 1,
              e: dx,
              f: dy,
            }
          }

          var cssMatrix = 'matrix('
            .concat(ghostMatrix.a, ',')
            .concat(ghostMatrix.b, ',')
            .concat(ghostMatrix.c, ',')
            .concat(ghostMatrix.d, ',')
            .concat(ghostMatrix.e, ',')
            .concat(ghostMatrix.f, ')')
          css(ghostEl, 'webkitTransform', cssMatrix)
          css(ghostEl, 'mozTransform', cssMatrix)
          css(ghostEl, 'msTransform', cssMatrix)
          css(ghostEl, 'transform', cssMatrix)
          lastDx = dx
          lastDy = dy
          touchEvt = touch
        }

        evt.cancelable && evt.preventDefault()
      }
    },
    _appendGhost: function _appendGhost() {
      // Bug if using scale(): https://stackoverflow.com/questions/2637058
      // Not being adjusted for
      if (!ghostEl) {
        var container = this.options.fallbackOnBody ? document.body : rootEl,
          rect = getRect(dragEl, true, PositionGhostAbsolutely, true, container),
          options = this.options // Position absolutely

        if (PositionGhostAbsolutely) {
          // Get relatively positioned parent
          ghostRelativeParent = container

          while (
            css(ghostRelativeParent, 'position') === 'static' &&
            css(ghostRelativeParent, 'transform') === 'none' &&
            ghostRelativeParent !== document
          ) {
            ghostRelativeParent = ghostRelativeParent.parentNode
          }

          if (
            ghostRelativeParent !== document.body &&
            ghostRelativeParent !== document.documentElement
          ) {
            if (ghostRelativeParent === document) ghostRelativeParent = getWindowScrollingElement()
            rect.top += ghostRelativeParent.scrollTop
            rect.left += ghostRelativeParent.scrollLeft
          } else {
            ghostRelativeParent = getWindowScrollingElement()
          }

          ghostRelativeParentInitialScroll = getRelativeScrollOffset(ghostRelativeParent)
        }

        ghostEl = dragEl.cloneNode(true)
        toggleClass(ghostEl, options.ghostClass, false)
        toggleClass(ghostEl, options.fallbackClass, true)
        toggleClass(ghostEl, options.dragClass, true)
        css(ghostEl, 'transition', '')
        css(ghostEl, 'transform', '')
        css(ghostEl, 'box-sizing', 'border-box')
        css(ghostEl, 'margin', 0)
        css(ghostEl, 'top', rect.top)
        css(ghostEl, 'left', rect.left)
        css(ghostEl, 'width', rect.width)
        css(ghostEl, 'height', rect.height)
        css(ghostEl, 'opacity', '0.8')
        css(ghostEl, 'position', PositionGhostAbsolutely ? 'absolute' : 'fixed')
        css(ghostEl, 'zIndex', '100000')
        css(ghostEl, 'pointerEvents', 'none')
        Sortable.ghost = ghostEl
        container.appendChild(ghostEl) // Set transform-origin

        css(
          ghostEl,
          'transform-origin',
          (tapDistanceLeft / parseInt(ghostEl.style.width)) * 100 +
            '% ' +
            (tapDistanceTop / parseInt(ghostEl.style.height)) * 100 +
            '%',
        )
      }
    },
    _onDragStart: function _onDragStart(
      /**Event*/
      evt,
      /**boolean*/
      fallback,
    ) {
      var _this = this

      var dataTransfer = evt.dataTransfer
      var options = _this.options
      pluginEvent('dragStart', this, {
        evt: evt,
      })

      if (Sortable.eventCanceled) {
        this._onDrop()

        return
      }

      pluginEvent('setupClone', this)

      if (!Sortable.eventCanceled) {
        cloneEl = clone(dragEl)
        cloneEl.draggable = false
        cloneEl.style['will-change'] = ''

        this._hideClone()

        toggleClass(cloneEl, this.options.chosenClass, false)
        Sortable.clone = cloneEl
      } // #1143: IFrame support workaround

      _this.cloneId = _nextTick(function () {
        pluginEvent('clone', _this)
        if (Sortable.eventCanceled) return

        if (!_this.options.removeCloneOnHide) {
          rootEl.insertBefore(cloneEl, dragEl)
        }

        _this._hideClone()

        _dispatchEvent({
          sortable: _this,
          name: 'clone',
        })
      })
      !fallback && toggleClass(dragEl, options.dragClass, true) // Set proper drop events

      if (fallback) {
        ignoreNextClick = true
        _this._loopId = setInterval(_this._emulateDragOver, 50)
      } else {
        // Undo what was set in _prepareDragStart before drag started
        off(document, 'mouseup', _this._onDrop)
        off(document, 'touchend', _this._onDrop)
        off(document, 'touchcancel', _this._onDrop)

        if (dataTransfer) {
          dataTransfer.effectAllowed = 'move'
          options.setData && options.setData.call(_this, dataTransfer, dragEl)
        }

        on(document, 'drop', _this) // #1276 fix:

        css(dragEl, 'transform', 'translateZ(0)')
      }

      awaitingDragStarted = true
      _this._dragStartId = _nextTick(_this._dragStarted.bind(_this, fallback, evt))
      on(document, 'selectstart', _this)
      moved = true

      if (Safari) {
        css(document.body, 'user-select', 'none')
      }
    },
    // Returns true - if no further action is needed (either inserted or another condition)
    _onDragOver: function _onDragOver(
      /**Event*/
      evt,
    ) {
      var el = this.el,
        target = evt.target,
        dragRect,
        targetRect,
        revert,
        options = this.options,
        group = options.group,
        activeSortable = Sortable.active,
        isOwner = activeGroup === group,
        canSort = options.sort,
        fromSortable = putSortable || activeSortable,
        vertical,
        _this = this,
        completedFired = false

      if (_silent) return

      function dragOverEvent(name, extra) {
        pluginEvent(
          name,
          _this,
          _objectSpread(
            {
              evt: evt,
              isOwner: isOwner,
              axis: vertical ? 'vertical' : 'horizontal',
              revert: revert,
              dragRect: dragRect,
              targetRect: targetRect,
              canSort: canSort,
              fromSortable: fromSortable,
              target: target,
              completed: completed,
              onMove: function onMove(target, after) {
                return _onMove(rootEl, el, dragEl, dragRect, target, getRect(target), evt, after)
              },
              changed: changed,
            },
            extra,
          ),
        )
      } // Capture animation state

      function capture() {
        dragOverEvent('dragOverAnimationCapture')

        _this.captureAnimationState()

        if (_this !== fromSortable) {
          fromSortable.captureAnimationState()
        }
      } // Return invocation when dragEl is inserted (or completed)

      function completed(insertion) {
        dragOverEvent('dragOverCompleted', {
          insertion: insertion,
        })

        if (insertion) {
          // Clones must be hidden before folding animation to capture dragRectAbsolute properly
          if (isOwner) {
            activeSortable._hideClone()
          } else {
            activeSortable._showClone(_this)
          }

          if (_this !== fromSortable) {
            // Set ghost class to new sortable's ghost class
            toggleClass(
              dragEl,
              putSortable ? putSortable.options.ghostClass : activeSortable.options.ghostClass,
              false,
            )
            toggleClass(dragEl, options.ghostClass, true)
          }

          if (putSortable !== _this && _this !== Sortable.active) {
            putSortable = _this
          } else if (_this === Sortable.active && putSortable) {
            putSortable = null
          } // Animation

          if (fromSortable === _this) {
            _this._ignoreWhileAnimating = target
          }

          _this.animateAll(function () {
            dragOverEvent('dragOverAnimationComplete')
            _this._ignoreWhileAnimating = null
          })

          if (_this !== fromSortable) {
            fromSortable.animateAll()
            fromSortable._ignoreWhileAnimating = null
          }
        } // Null lastTarget if it is not inside a previously swapped element

        if ((target === dragEl && !dragEl.animated) || (target === el && !target.animated)) {
          lastTarget = null
        } // no bubbling and not fallback

        if (!options.dragoverBubble && !evt.rootEl && target !== document) {
          dragEl.parentNode[expando]._isOutsideThisEl(evt.target) // Do not detect for empty insert if already inserted

          !insertion && nearestEmptyInsertDetectEvent(evt)
        }

        !options.dragoverBubble && evt.stopPropagation && evt.stopPropagation()
        return (completedFired = true)
      } // Call when dragEl has been inserted

      function changed() {
        newIndex = index(dragEl)
        newDraggableIndex = index(dragEl, options.draggable)

        _dispatchEvent({
          sortable: _this,
          name: 'change',
          toEl: el,
          newIndex: newIndex,
          newDraggableIndex: newDraggableIndex,
          originalEvent: evt,
        })
      }

      if (evt.preventDefault !== void 0) {
        evt.cancelable && evt.preventDefault()
      }

      target = closest(target, options.draggable, el, true)
      dragOverEvent('dragOver')
      if (Sortable.eventCanceled) return completedFired

      if (
        dragEl.contains(evt.target) ||
        (target.animated && target.animatingX && target.animatingY) ||
        _this._ignoreWhileAnimating === target
      ) {
        return completed(false)
      }

      ignoreNextClick = false

      if (
        activeSortable &&
        !options.disabled &&
        (isOwner
          ? canSort || (revert = !rootEl.contains(dragEl)) // Reverting item into the original list
          : putSortable === this ||
            ((this.lastPutMode = activeGroup.checkPull(this, activeSortable, dragEl, evt)) &&
              group.checkPut(this, activeSortable, dragEl, evt)))
      ) {
        vertical = this._getDirection(evt, target) === 'vertical'
        dragRect = getRect(dragEl)
        dragOverEvent('dragOverValid')
        if (Sortable.eventCanceled) return completedFired

        if (revert) {
          parentEl = rootEl // actualization

          capture()

          this._hideClone()

          dragOverEvent('revert')

          if (!Sortable.eventCanceled) {
            if (nextEl) {
              rootEl.insertBefore(dragEl, nextEl)
            } else {
              rootEl.appendChild(dragEl)
            }
          }

          return completed(true)
        }

        var elLastChild = lastChild(el, options.draggable)

        if (!elLastChild || (_ghostIsLast(evt, vertical, this) && !elLastChild.animated)) {
          // If already at end of list: Do not insert
          if (elLastChild === dragEl) {
            return completed(false)
          } // assign target only if condition is true

          if (elLastChild && el === evt.target) {
            target = elLastChild
          }

          if (target) {
            targetRect = getRect(target)
          }

          if (_onMove(rootEl, el, dragEl, dragRect, target, targetRect, evt, !!target) !== false) {
            capture()
            el.appendChild(dragEl)
            parentEl = el // actualization

            changed()
            return completed(true)
          }
        } else if (target.parentNode === el) {
          targetRect = getRect(target)
          var direction = 0,
            targetBeforeFirstSwap,
            differentLevel = dragEl.parentNode !== el,
            differentRowCol = !_dragElInRowColumn(
              (dragEl.animated && dragEl.toRect) || dragRect,
              (target.animated && target.toRect) || targetRect,
              vertical,
            ),
            side1 = vertical ? 'top' : 'left',
            scrolledPastTop =
              isScrolledPast(target, 'top', 'top') || isScrolledPast(dragEl, 'top', 'top'),
            scrollBefore = scrolledPastTop ? scrolledPastTop.scrollTop : void 0

          if (lastTarget !== target) {
            targetBeforeFirstSwap = targetRect[side1]
            pastFirstInvertThresh = false
            isCircumstantialInvert = (!differentRowCol && options.invertSwap) || differentLevel
          }

          direction = _getSwapDirection(
            evt,
            target,
            targetRect,
            vertical,
            differentRowCol ? 1 : options.swapThreshold,
            options.invertedSwapThreshold == null
              ? options.swapThreshold
              : options.invertedSwapThreshold,
            isCircumstantialInvert,
            lastTarget === target,
          )
          var sibling

          if (direction !== 0) {
            // Check if target is beside dragEl in respective direction (ignoring hidden elements)
            var dragIndex = index(dragEl)

            do {
              dragIndex -= direction
              sibling = parentEl.children[dragIndex]
            } while (sibling && (css(sibling, 'display') === 'none' || sibling === ghostEl))
          } // If dragEl is already beside target: Do not insert

          if (direction === 0 || sibling === target) {
            return completed(false)
          }

          lastTarget = target
          lastDirection = direction
          var nextSibling = target.nextElementSibling,
            after = false
          after = direction === 1

          var moveVector = _onMove(rootEl, el, dragEl, dragRect, target, targetRect, evt, after)

          if (moveVector !== false) {
            if (moveVector === 1 || moveVector === -1) {
              after = moveVector === 1
            }

            _silent = true
            setTimeout(_unsilent, 30)
            capture()

            if (after && !nextSibling) {
              el.appendChild(dragEl)
            } else {
              target.parentNode.insertBefore(dragEl, after ? nextSibling : target)
            } // Undo chrome's scroll adjustment (has no effect on other browsers)

            if (scrolledPastTop) {
              scrollBy(scrolledPastTop, 0, scrollBefore - scrolledPastTop.scrollTop)
            }

            parentEl = dragEl.parentNode // actualization
            // must be done before animation

            if (targetBeforeFirstSwap !== undefined && !isCircumstantialInvert) {
              targetMoveDistance = Math.abs(targetBeforeFirstSwap - getRect(target)[side1])
            }

            changed()
            return completed(true)
          }
        }

        if (el.contains(dragEl)) {
          return completed(false)
        }
      }

      return false
    },
    _ignoreWhileAnimating: null,
    _offMoveEvents: function _offMoveEvents() {
      off(document, 'mousemove', this._onTouchMove)
      off(document, 'touchmove', this._onTouchMove)
      off(document, 'pointermove', this._onTouchMove)
      off(document, 'dragover', nearestEmptyInsertDetectEvent)
      off(document, 'mousemove', nearestEmptyInsertDetectEvent)
      off(document, 'touchmove', nearestEmptyInsertDetectEvent)
    },
    _offUpEvents: function _offUpEvents() {
      var ownerDocument = this.el.ownerDocument
      off(ownerDocument, 'mouseup', this._onDrop)
      off(ownerDocument, 'touchend', this._onDrop)
      off(ownerDocument, 'pointerup', this._onDrop)
      off(ownerDocument, 'touchcancel', this._onDrop)
      off(document, 'selectstart', this)
    },
    _onDrop: function _onDrop(
      /**Event*/
      evt,
    ) {
      var el = this.el,
        options = this.options // Get the index of the dragged element within its parent

      newIndex = index(dragEl)
      newDraggableIndex = index(dragEl, options.draggable)
      pluginEvent('drop', this, {
        evt: evt,
      })
      parentEl = dragEl && dragEl.parentNode // Get again after plugin event

      newIndex = index(dragEl)
      newDraggableIndex = index(dragEl, options.draggable)

      if (Sortable.eventCanceled) {
        this._nulling()

        return
      }

      awaitingDragStarted = false
      isCircumstantialInvert = false
      pastFirstInvertThresh = false
      clearInterval(this._loopId)
      clearTimeout(this._dragStartTimer)

      _cancelNextTick(this.cloneId)

      _cancelNextTick(this._dragStartId) // Unbind events

      if (this.nativeDraggable) {
        off(document, 'drop', this)
        off(el, 'dragstart', this._onDragStart)
      }

      this._offMoveEvents()

      this._offUpEvents()

      if (Safari) {
        css(document.body, 'user-select', '')
      }

      css(dragEl, 'transform', '')

      if (evt) {
        if (moved) {
          evt.cancelable && evt.preventDefault()
          !options.dropBubble && evt.stopPropagation()
        }

        ghostEl && ghostEl.parentNode && ghostEl.parentNode.removeChild(ghostEl)

        if (rootEl === parentEl || (putSortable && putSortable.lastPutMode !== 'clone')) {
          // Remove clone(s)
          cloneEl && cloneEl.parentNode && cloneEl.parentNode.removeChild(cloneEl)
        }

        if (dragEl) {
          if (this.nativeDraggable) {
            off(dragEl, 'dragend', this)
          }

          _disableDraggable(dragEl)

          dragEl.style['will-change'] = '' // Remove classes
          // ghostClass is added in dragStarted

          if (moved && !awaitingDragStarted) {
            toggleClass(
              dragEl,
              putSortable ? putSortable.options.ghostClass : this.options.ghostClass,
              false,
            )
          }

          toggleClass(dragEl, this.options.chosenClass, false) // Drag stop event

          _dispatchEvent({
            sortable: this,
            name: 'unchoose',
            toEl: parentEl,
            newIndex: null,
            newDraggableIndex: null,
            originalEvent: evt,
          })

          if (rootEl !== parentEl) {
            if (newIndex >= 0) {
              // Add event
              _dispatchEvent({
                rootEl: parentEl,
                name: 'add',
                toEl: parentEl,
                fromEl: rootEl,
                originalEvent: evt,
              }) // Remove event

              _dispatchEvent({
                sortable: this,
                name: 'remove',
                toEl: parentEl,
                originalEvent: evt,
              }) // drag from one list and drop into another

              _dispatchEvent({
                rootEl: parentEl,
                name: 'sort',
                toEl: parentEl,
                fromEl: rootEl,
                originalEvent: evt,
              })

              _dispatchEvent({
                sortable: this,
                name: 'sort',
                toEl: parentEl,
                originalEvent: evt,
              })
            }

            putSortable && putSortable.save()
          } else {
            if (newIndex !== oldIndex) {
              if (newIndex >= 0) {
                // drag & drop within the same list
                _dispatchEvent({
                  sortable: this,
                  name: 'update',
                  toEl: parentEl,
                  originalEvent: evt,
                })

                _dispatchEvent({
                  sortable: this,
                  name: 'sort',
                  toEl: parentEl,
                  originalEvent: evt,
                })
              }
            }
          }

          if (Sortable.active) {
            /* jshint eqnull:true */
            if (newIndex == null || newIndex === -1) {
              newIndex = oldIndex
              newDraggableIndex = oldDraggableIndex
            }

            _dispatchEvent({
              sortable: this,
              name: 'end',
              toEl: parentEl,
              originalEvent: evt,
            }) // Save sorting

            this.save()
          }
        }
      }

      this._nulling()
    },
    _nulling: function _nulling() {
      pluginEvent('nulling', this)
      rootEl = dragEl = parentEl = ghostEl = nextEl = cloneEl = lastDownEl = cloneHidden = tapEvt = touchEvt = moved = newIndex = newDraggableIndex = oldIndex = oldDraggableIndex = lastTarget = lastDirection = putSortable = activeGroup = Sortable.dragged = Sortable.ghost = Sortable.clone = Sortable.active = null
      savedInputChecked.forEach(function (el) {
        el.checked = true
      })
      savedInputChecked.length = lastDx = lastDy = 0
    },
    handleEvent: function handleEvent(
      /**Event*/
      evt,
    ) {
      switch (evt.type) {
        case 'drop':
        case 'dragend':
          this._onDrop(evt)

          break

        case 'dragenter':
        case 'dragover':
          if (dragEl) {
            this._onDragOver(evt)

            _globalDragOver(evt)
          }

          break

        case 'selectstart':
          evt.preventDefault()
          break
      }
    },

    /**
     * Serializes the item into an array of string.
     * @returns {String[]}
     */
    toArray: function toArray() {
      var order = [],
        el,
        children = this.el.children,
        i = 0,
        n = children.length,
        options = this.options

      for (; i < n; i++) {
        el = children[i]

        if (closest(el, options.draggable, this.el, false)) {
          order.push(el.getAttribute(options.dataIdAttr) || _generateId(el))
        }
      }

      return order
    },

    /**
     * Sorts the elements according to the array.
     * @param  {String[]}  order  order of the items
     */
    sort: function sort(order, useAnimation) {
      var items = {},
        rootEl = this.el
      this.toArray().forEach(function (id, i) {
        var el = rootEl.children[i]

        if (closest(el, this.options.draggable, rootEl, false)) {
          items[id] = el
        }
      }, this)
      useAnimation && this.captureAnimationState()
      order.forEach(function (id) {
        if (items[id]) {
          rootEl.removeChild(items[id])
          rootEl.appendChild(items[id])
        }
      })
      useAnimation && this.animateAll()
    },

    /**
     * Save the current sorting
     */
    save: function save() {
      var store = this.options.store
      store && store.set && store.set(this)
    },

    /**
     * For each element in the set, get the first element that matches the selector by testing the element itself and traversing up through its ancestors in the DOM tree.
     * @param   {HTMLElement}  el
     * @param   {String}       [selector]  default: `options.draggable`
     * @returns {HTMLElement|null}
     */
    closest: function closest$1(el, selector) {
      return closest(el, selector || this.options.draggable, this.el, false)
    },

    /**
     * Set/get option
     * @param   {string} name
     * @param   {*}      [value]
     * @returns {*}
     */
    option: function option(name, value) {
      var options = this.options

      if (value === void 0) {
        return options[name]
      } else {
        var modifiedValue = PluginManager.modifyOption(this, name, value)

        if (typeof modifiedValue !== 'undefined') {
          options[name] = modifiedValue
        } else {
          options[name] = value
        }

        if (name === 'group') {
          _prepareGroup(options)
        }
      }
    },

    /**
     * Destroy
     */
    destroy: function destroy() {
      pluginEvent('destroy', this)
      var el = this.el
      el[expando] = null
      off(el, 'mousedown', this._onTapStart)
      off(el, 'touchstart', this._onTapStart)
      off(el, 'pointerdown', this._onTapStart)

      if (this.nativeDraggable) {
        off(el, 'dragover', this)
        off(el, 'dragenter', this)
      } // Remove draggable attributes

      Array.prototype.forEach.call(el.querySelectorAll('[draggable]'), function (el) {
        el.removeAttribute('draggable')
      })

      this._onDrop()

      this._disableDelayedDragEvents()

      sortables.splice(sortables.indexOf(this.el), 1)
      this.el = el = null
    },
    _hideClone: function _hideClone() {
      if (!cloneHidden) {
        pluginEvent('hideClone', this)
        if (Sortable.eventCanceled) return
        css(cloneEl, 'display', 'none')

        if (this.options.removeCloneOnHide && cloneEl.parentNode) {
          cloneEl.parentNode.removeChild(cloneEl)
        }

        cloneHidden = true
      }
    },
    _showClone: function _showClone(putSortable) {
      if (putSortable.lastPutMode !== 'clone') {
        this._hideClone()

        return
      }

      if (cloneHidden) {
        pluginEvent('showClone', this)
        if (Sortable.eventCanceled) return // show clone at dragEl or original position

        if (dragEl.parentNode == rootEl && !this.options.group.revertClone) {
          rootEl.insertBefore(cloneEl, dragEl)
        } else if (nextEl) {
          rootEl.insertBefore(cloneEl, nextEl)
        } else {
          rootEl.appendChild(cloneEl)
        }

        if (this.options.group.revertClone) {
          this.animate(dragEl, cloneEl)
        }

        css(cloneEl, 'display', '')
        cloneHidden = false
      }
    },
  }

function _globalDragOver(
  /**Event*/
  evt,
) {
  if (evt.dataTransfer) {
    evt.dataTransfer.dropEffect = 'move'
  }

  evt.cancelable && evt.preventDefault()
}

function _onMove(
  fromEl,
  toEl,
  dragEl,
  dragRect,
  targetEl,
  targetRect,
  originalEvent,
  willInsertAfter,
) {
  var evt,
    sortable = fromEl[expando],
    onMoveFn = sortable.options.onMove,
    retVal // Support for new CustomEvent feature

  if (window.CustomEvent && !IE11OrLess && !Edge) {
    evt = new CustomEvent('move', {
      bubbles: true,
      cancelable: true,
    })
  } else {
    evt = document.createEvent('Event')
    evt.initEvent('move', true, true)
  }

  evt.to = toEl
  evt.from = fromEl
  evt.dragged = dragEl
  evt.draggedRect = dragRect
  evt.related = targetEl || toEl
  evt.relatedRect = targetRect || getRect(toEl)
  evt.willInsertAfter = willInsertAfter
  evt.originalEvent = originalEvent
  fromEl.dispatchEvent(evt)

  if (onMoveFn) {
    retVal = onMoveFn.call(sortable, evt, originalEvent)
  }

  return retVal
}

function _disableDraggable(el) {
  el.draggable = false
}

function _unsilent() {
  _silent = false
}

function _ghostIsLast(evt, vertical, sortable) {
  var rect = getRect(lastChild(sortable.el, sortable.options.draggable))
  var spacer = 10
  return vertical
    ? evt.clientX > rect.right + spacer ||
        (evt.clientX <= rect.right && evt.clientY > rect.bottom && evt.clientX >= rect.left)
    : (evt.clientX > rect.right && evt.clientY > rect.top) ||
        (evt.clientX <= rect.right && evt.clientY > rect.bottom + spacer)
}

function _getSwapDirection(
  evt,
  target,
  targetRect,
  vertical,
  swapThreshold,
  invertedSwapThreshold,
  invertSwap,
  isLastTarget,
) {
  var mouseOnAxis = vertical ? evt.clientY : evt.clientX,
    targetLength = vertical ? targetRect.height : targetRect.width,
    targetS1 = vertical ? targetRect.top : targetRect.left,
    targetS2 = vertical ? targetRect.bottom : targetRect.right,
    invert = false

  if (!invertSwap) {
    // Never invert or create dragEl shadow when target movemenet causes mouse to move past the end of regular swapThreshold
    if (isLastTarget && targetMoveDistance < targetLength * swapThreshold) {
      // multiplied only by swapThreshold because mouse will already be inside target by (1 - threshold) * targetLength / 2
      // check if past first invert threshold on side opposite of lastDirection
      if (
        !pastFirstInvertThresh &&
        (lastDirection === 1
          ? mouseOnAxis > targetS1 + (targetLength * invertedSwapThreshold) / 2
          : mouseOnAxis < targetS2 - (targetLength * invertedSwapThreshold) / 2)
      ) {
        // past first invert threshold, do not restrict inverted threshold to dragEl shadow
        pastFirstInvertThresh = true
      }

      if (!pastFirstInvertThresh) {
        // dragEl shadow (target move distance shadow)
        if (
          lastDirection === 1
            ? mouseOnAxis < targetS1 + targetMoveDistance // over dragEl shadow
            : mouseOnAxis > targetS2 - targetMoveDistance
        ) {
          return -lastDirection
        }
      } else {
        invert = true
      }
    } else {
      // Regular
      if (
        mouseOnAxis > targetS1 + (targetLength * (1 - swapThreshold)) / 2 &&
        mouseOnAxis < targetS2 - (targetLength * (1 - swapThreshold)) / 2
      ) {
        return _getInsertDirection(target)
      }
    }
  }

  invert = invert || invertSwap

  if (invert) {
    // Invert of regular
    if (
      mouseOnAxis < targetS1 + (targetLength * invertedSwapThreshold) / 2 ||
      mouseOnAxis > targetS2 - (targetLength * invertedSwapThreshold) / 2
    ) {
      return mouseOnAxis > targetS1 + targetLength / 2 ? 1 : -1
    }
  }

  return 0
}
/**
 * Gets the direction dragEl must be swapped relative to target in order to make it
 * seem that dragEl has been "inserted" into that element's position
 * @param  {HTMLElement} target       The target whose position dragEl is being inserted at
 * @return {Number}                   Direction dragEl must be swapped
 */

function _getInsertDirection(target) {
  if (index(dragEl) < index(target)) {
    return 1
  } else {
    return -1
  }
}
/**
 * Generate id
 * @param   {HTMLElement} el
 * @returns {String}
 * @private
 */

function _generateId(el) {
  var str = el.tagName + el.className + el.src + el.href + el.textContent,
    i = str.length,
    sum = 0

  while (i--) {
    sum += str.charCodeAt(i)
  }

  return sum.toString(36)
}

function _saveInputCheckedState(root) {
  savedInputChecked.length = 0
  var inputs = root.getElementsByTagName('input')
  var idx = inputs.length

  while (idx--) {
    var el = inputs[idx]
    el.checked && savedInputChecked.push(el)
  }
}

function _nextTick(fn) {
  return setTimeout(fn, 0)
}

function _cancelNextTick(id) {
  return clearTimeout(id)
} // Fixed #973:

if (documentExists) {
  on(document, 'touchmove', function (evt) {
    if ((Sortable.active || awaitingDragStarted) && evt.cancelable) {
      evt.preventDefault()
    }
  })
} // Export utils

Sortable.utils = {
  on: on,
  off: off,
  css: css,
  find: find,
  is: function is(el, selector) {
    return !!closest(el, selector, el, false)
  },
  extend: extend,
  throttle: throttle,
  closest: closest,
  toggleClass: toggleClass,
  clone: clone,
  index: index,
  nextTick: _nextTick,
  cancelNextTick: _cancelNextTick,
  detectDirection: _detectDirection,
  getChild: getChild,
}
/**
 * Get the Sortable instance of an element
 * @param  {HTMLElement} element The element
 * @return {Sortable|undefined}         The instance of Sortable
 */

Sortable.get = function (element) {
  return element[expando]
}
/**
 * Mount a plugin to Sortable
 * @param  {...SortablePlugin|SortablePlugin[]} plugins       Plugins being mounted
 */

Sortable.mount = function () {
  for (var _len = arguments.length, plugins = new Array(_len), _key = 0; _key < _len; _key++) {
    plugins[_key] = arguments[_key]
  }

  if (plugins[0].constructor === Array) plugins = plugins[0]
  plugins.forEach(function (plugin) {
    if (!plugin.prototype || !plugin.prototype.constructor) {
      throw 'Sortable: Mounted plugin must be a constructor function, not '.concat(
        {}.toString.call(plugin),
      )
    }

    if (plugin.utils) Sortable.utils = _objectSpread({}, Sortable.utils, plugin.utils)
    PluginManager.mount(plugin)
  })
}
/**
 * Create sortable instance
 * @param {HTMLElement}  el
 * @param {Object}      [options]
 */

Sortable.create = function (el, options) {
  return new Sortable(el, options)
} // Export

Sortable.version = version

var autoScrolls = [],
  scrollEl,
  scrollRootEl,
  scrolling = false,
  lastAutoScrollX,
  lastAutoScrollY,
  touchEvt$1,
  pointerElemChangedInterval

function AutoScrollPlugin() {
  function AutoScroll() {
    this.defaults = {
      scroll: true,
      scrollSensitivity: 30,
      scrollSpeed: 10,
      bubbleScroll: true,
    } // Bind all private methods

    for (var fn in this) {
      if (fn.charAt(0) === '_' && typeof this[fn] === 'function') {
        this[fn] = this[fn].bind(this)
      }
    }
  }

  AutoScroll.prototype = {
    dragStarted: function dragStarted(_ref) {
      var originalEvent = _ref.originalEvent

      if (this.sortable.nativeDraggable) {
        on(document, 'dragover', this._handleAutoScroll)
      } else {
        if (this.options.supportPointer) {
          on(document, 'pointermove', this._handleFallbackAutoScroll)
        } else if (originalEvent.touches) {
          on(document, 'touchmove', this._handleFallbackAutoScroll)
        } else {
          on(document, 'mousemove', this._handleFallbackAutoScroll)
        }
      }
    },
    dragOverCompleted: function dragOverCompleted(_ref2) {
      var originalEvent = _ref2.originalEvent

      // For when bubbling is canceled and using fallback (fallback 'touchmove' always reached)
      if (!this.options.dragOverBubble && !originalEvent.rootEl) {
        this._handleAutoScroll(originalEvent)
      }
    },
    drop: function drop() {
      if (this.sortable.nativeDraggable) {
        off(document, 'dragover', this._handleAutoScroll)
      } else {
        off(document, 'pointermove', this._handleFallbackAutoScroll)
        off(document, 'touchmove', this._handleFallbackAutoScroll)
        off(document, 'mousemove', this._handleFallbackAutoScroll)
      }

      clearPointerElemChangedInterval()
      clearAutoScrolls()
      cancelThrottle()
    },
    nulling: function nulling() {
      touchEvt$1 = scrollRootEl = scrollEl = scrolling = pointerElemChangedInterval = lastAutoScrollX = lastAutoScrollY = null
      autoScrolls.length = 0
    },
    _handleFallbackAutoScroll: function _handleFallbackAutoScroll(evt) {
      this._handleAutoScroll(evt, true)
    },
    _handleAutoScroll: function _handleAutoScroll(evt, fallback) {
      var _this = this

      var x = (evt.touches ? evt.touches[0] : evt).clientX,
        y = (evt.touches ? evt.touches[0] : evt).clientY,
        elem = document.elementFromPoint(x, y)
      touchEvt$1 = evt // IE does not seem to have native autoscroll,
      // Edge's autoscroll seems too conditional,
      // MACOS Safari does not have autoscroll,
      // Firefox and Chrome are good

      if (fallback || Edge || IE11OrLess || Safari) {
        autoScroll(evt, this.options, elem, fallback) // Listener for pointer element change

        var ogElemScroller = getParentAutoScrollElement(elem, true)

        if (
          scrolling &&
          (!pointerElemChangedInterval || x !== lastAutoScrollX || y !== lastAutoScrollY)
        ) {
          pointerElemChangedInterval && clearPointerElemChangedInterval() // Detect for pointer elem change, emulating native DnD behaviour

          pointerElemChangedInterval = setInterval(function () {
            var newElem = getParentAutoScrollElement(document.elementFromPoint(x, y), true)

            if (newElem !== ogElemScroller) {
              ogElemScroller = newElem
              clearAutoScrolls()
            }

            autoScroll(evt, _this.options, newElem, fallback)
          }, 10)
          lastAutoScrollX = x
          lastAutoScrollY = y
        }
      } else {
        // if DnD is enabled (and browser has good autoscrolling), first autoscroll will already scroll, so get parent autoscroll of first autoscroll
        if (
          !this.options.bubbleScroll ||
          getParentAutoScrollElement(elem, true) === getWindowScrollingElement()
        ) {
          clearAutoScrolls()
          return
        }

        autoScroll(evt, this.options, getParentAutoScrollElement(elem, false), false)
      }
    },
  }
  return _extends(AutoScroll, {
    pluginName: 'scroll',
    initializeByDefault: true,
  })
}

function clearAutoScrolls() {
  autoScrolls.forEach(function (autoScroll) {
    clearInterval(autoScroll.pid)
  })
  autoScrolls = []
}

function clearPointerElemChangedInterval() {
  clearInterval(pointerElemChangedInterval)
}

var autoScroll = throttle(function (evt, options, rootEl, isFallback) {
  // Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=505521
  if (!options.scroll) return
  var x = (evt.touches ? evt.touches[0] : evt).clientX,
    y = (evt.touches ? evt.touches[0] : evt).clientY,
    sens = options.scrollSensitivity,
    speed = options.scrollSpeed,
    winScroller = getWindowScrollingElement()
  var scrollThisInstance = false,
    scrollCustomFn // New scroll root, set scrollEl

  if (scrollRootEl !== rootEl) {
    scrollRootEl = rootEl
    clearAutoScrolls()
    scrollEl = options.scroll
    scrollCustomFn = options.scrollFn

    if (scrollEl === true) {
      scrollEl = getParentAutoScrollElement(rootEl, true)
    }
  }

  var layersOut = 0
  var currentParent = scrollEl

  do {
    var el = currentParent,
      rect = getRect(el),
      top = rect.top,
      bottom = rect.bottom,
      left = rect.left,
      right = rect.right,
      width = rect.width,
      height = rect.height,
      canScrollX = void 0,
      canScrollY = void 0,
      scrollWidth = el.scrollWidth,
      scrollHeight = el.scrollHeight,
      elCSS = css(el),
      scrollPosX = el.scrollLeft,
      scrollPosY = el.scrollTop

    if (el === winScroller) {
      canScrollX =
        width < scrollWidth &&
        (elCSS.overflowX === 'auto' ||
          elCSS.overflowX === 'scroll' ||
          elCSS.overflowX === 'visible')
      canScrollY =
        height < scrollHeight &&
        (elCSS.overflowY === 'auto' ||
          elCSS.overflowY === 'scroll' ||
          elCSS.overflowY === 'visible')
    } else {
      canScrollX =
        width < scrollWidth && (elCSS.overflowX === 'auto' || elCSS.overflowX === 'scroll')
      canScrollY =
        height < scrollHeight && (elCSS.overflowY === 'auto' || elCSS.overflowY === 'scroll')
    }

    var vx =
      canScrollX &&
      (Math.abs(right - x) <= sens && scrollPosX + width < scrollWidth) -
        (Math.abs(left - x) <= sens && !!scrollPosX)
    var vy =
      canScrollY &&
      (Math.abs(bottom - y) <= sens && scrollPosY + height < scrollHeight) -
        (Math.abs(top - y) <= sens && !!scrollPosY)

    if (!autoScrolls[layersOut]) {
      for (var i = 0; i <= layersOut; i++) {
        if (!autoScrolls[i]) {
          autoScrolls[i] = {}
        }
      }
    }

    if (
      autoScrolls[layersOut].vx != vx ||
      autoScrolls[layersOut].vy != vy ||
      autoScrolls[layersOut].el !== el
    ) {
      autoScrolls[layersOut].el = el
      autoScrolls[layersOut].vx = vx
      autoScrolls[layersOut].vy = vy
      clearInterval(autoScrolls[layersOut].pid)

      if (vx != 0 || vy != 0) {
        scrollThisInstance = true
        /* jshint loopfunc:true */

        autoScrolls[layersOut].pid = setInterval(
          function () {
            // emulate drag over during autoscroll (fallback), emulating native DnD behaviour
            if (isFallback && this.layer === 0) {
              Sortable.active._onTouchMove(touchEvt$1) // To move ghost if it is positioned absolutely
            }

            var scrollOffsetY = autoScrolls[this.layer].vy ? autoScrolls[this.layer].vy * speed : 0
            var scrollOffsetX = autoScrolls[this.layer].vx ? autoScrolls[this.layer].vx * speed : 0

            if (typeof scrollCustomFn === 'function') {
              if (
                scrollCustomFn.call(
                  Sortable.dragged.parentNode[expando],
                  scrollOffsetX,
                  scrollOffsetY,
                  evt,
                  touchEvt$1,
                  autoScrolls[this.layer].el,
                ) !== 'continue'
              ) {
                return
              }
            }

            scrollBy(autoScrolls[this.layer].el, scrollOffsetX, scrollOffsetY)
          }.bind({
            layer: layersOut,
          }),
          24,
        )
      }
    }

    layersOut++
  } while (options.bubbleScroll && currentParent !== winScroller && (currentParent = getParentAutoScrollElement(currentParent, false)))

  scrolling = scrollThisInstance // in case another function catches scrolling as false in between when it is not
}, 30)

var drop = function drop(_ref) {
  var originalEvent = _ref.originalEvent,
    putSortable = _ref.putSortable,
    dragEl = _ref.dragEl,
    activeSortable = _ref.activeSortable,
    dispatchSortableEvent = _ref.dispatchSortableEvent,
    hideGhostForTarget = _ref.hideGhostForTarget,
    unhideGhostForTarget = _ref.unhideGhostForTarget
  if (!originalEvent) return
  var toSortable = putSortable || activeSortable
  hideGhostForTarget()
  var touch =
    originalEvent.changedTouches && originalEvent.changedTouches.length
      ? originalEvent.changedTouches[0]
      : originalEvent
  var target = document.elementFromPoint(touch.clientX, touch.clientY)
  unhideGhostForTarget()

  if (toSortable && !toSortable.el.contains(target)) {
    dispatchSortableEvent('spill')
    this.onSpill({
      dragEl: dragEl,
      putSortable: putSortable,
    })
  }
}

function Revert() {}

Revert.prototype = {
  startIndex: null,
  dragStart: function dragStart(_ref2) {
    var oldDraggableIndex = _ref2.oldDraggableIndex
    this.startIndex = oldDraggableIndex
  },
  onSpill: function onSpill(_ref3) {
    var dragEl = _ref3.dragEl,
      putSortable = _ref3.putSortable
    this.sortable.captureAnimationState()

    if (putSortable) {
      putSortable.captureAnimationState()
    }

    var nextSibling = getChild(this.sortable.el, this.startIndex, this.options)

    if (nextSibling) {
      this.sortable.el.insertBefore(dragEl, nextSibling)
    } else {
      this.sortable.el.appendChild(dragEl)
    }

    this.sortable.animateAll()

    if (putSortable) {
      putSortable.animateAll()
    }
  },
  drop: drop,
}

_extends(Revert, {
  pluginName: 'revertOnSpill',
})

function Remove() {}

Remove.prototype = {
  onSpill: function onSpill(_ref4) {
    var dragEl = _ref4.dragEl,
      putSortable = _ref4.putSortable
    var parentSortable = putSortable || this.sortable
    parentSortable.captureAnimationState()
    dragEl.parentNode && dragEl.parentNode.removeChild(dragEl)
    parentSortable.animateAll()
  },
  drop: drop,
}

_extends(Remove, {
  pluginName: 'removeOnSpill',
})

var OnSpill = [Remove, Revert]

var lastSwapEl

function SwapPlugin() {
  function Swap() {
    this.defaults = {
      swapClass: 'sortable-swap-highlight',
    }
  }

  Swap.prototype = {
    dragStart: function dragStart(_ref) {
      var dragEl = _ref.dragEl
      lastSwapEl = dragEl
    },
    dragOverValid: function dragOverValid(_ref2) {
      var completed = _ref2.completed,
        target = _ref2.target,
        onMove = _ref2.onMove,
        activeSortable = _ref2.activeSortable,
        changed = _ref2.changed,
        cancel = _ref2.cancel
      if (!activeSortable.options.swap) return
      var el = this.sortable.el,
        options = this.options

      if (target && target !== el) {
        var prevSwapEl = lastSwapEl

        if (onMove(target) !== false) {
          toggleClass(target, options.swapClass, true)
          lastSwapEl = target
        } else {
          lastSwapEl = null
        }

        if (prevSwapEl && prevSwapEl !== lastSwapEl) {
          toggleClass(prevSwapEl, options.swapClass, false)
        }
      }

      changed()
      completed(true)
      cancel()
    },
    drop: function drop(_ref3) {
      var activeSortable = _ref3.activeSortable,
        putSortable = _ref3.putSortable,
        dragEl = _ref3.dragEl
      var toSortable = putSortable || this.sortable
      var options = this.options
      lastSwapEl && toggleClass(lastSwapEl, options.swapClass, false)

      if (lastSwapEl && (options.swap || (putSortable && putSortable.options.swap))) {
        if (dragEl !== lastSwapEl) {
          toSortable.captureAnimationState()
          if (toSortable !== activeSortable) activeSortable.captureAnimationState()
          swapNodes(dragEl, lastSwapEl)
          toSortable.animateAll()
          if (toSortable !== activeSortable) activeSortable.animateAll()
        }
      }
    },
    nulling: function nulling() {
      lastSwapEl = null
    },
  }
  return _extends(Swap, {
    pluginName: 'swap',
    eventProperties: function eventProperties() {
      return {
        swapItem: lastSwapEl,
      }
    },
  })
}

function swapNodes(n1, n2) {
  var p1 = n1.parentNode,
    p2 = n2.parentNode,
    i1,
    i2
  if (!p1 || !p2 || p1.isEqualNode(n2) || p2.isEqualNode(n1)) return
  i1 = index(n1)
  i2 = index(n2)

  if (p1.isEqualNode(p2) && i1 < i2) {
    i2++
  }

  p1.insertBefore(n2, p1.children[i1])
  p2.insertBefore(n1, p2.children[i2])
}

var multiDragElements = [],
  multiDragClones = [],
  lastMultiDragSelect,
  // for selection with modifier key down (SHIFT)
  multiDragSortable,
  initialFolding = false,
  // Initial multi-drag fold when drag started
  folding = false,
  // Folding any other time
  dragStarted = false,
  dragEl$1,
  clonesFromRect,
  clonesHidden

function MultiDragPlugin() {
  function MultiDrag(sortable) {
    // Bind all private methods
    for (var fn in this) {
      if (fn.charAt(0) === '_' && typeof this[fn] === 'function') {
        this[fn] = this[fn].bind(this)
      }
    }

    if (sortable.options.supportPointer) {
      on(document, 'pointerup', this._deselectMultiDrag)
    } else {
      on(document, 'mouseup', this._deselectMultiDrag)
      on(document, 'touchend', this._deselectMultiDrag)
    }

    on(document, 'keydown', this._checkKeyDown)
    on(document, 'keyup', this._checkKeyUp)
    this.defaults = {
      selectedClass: 'sortable-selected',
      multiDragKey: null,
      setData: function setData(dataTransfer, dragEl) {
        var data = ''

        if (multiDragElements.length && multiDragSortable === sortable) {
          multiDragElements.forEach(function (multiDragElement, i) {
            data += (!i ? '' : ', ') + multiDragElement.textContent
          })
        } else {
          data = dragEl.textContent
        }

        dataTransfer.setData('Text', data)
      },
    }
  }

  MultiDrag.prototype = {
    multiDragKeyDown: false,
    isMultiDrag: false,
    delayStartGlobal: function delayStartGlobal(_ref) {
      var dragged = _ref.dragEl
      dragEl$1 = dragged
    },
    delayEnded: function delayEnded() {
      this.isMultiDrag = ~multiDragElements.indexOf(dragEl$1)
    },
    setupClone: function setupClone(_ref2) {
      var sortable = _ref2.sortable,
        cancel = _ref2.cancel
      if (!this.isMultiDrag) return

      for (var i = 0; i < multiDragElements.length; i++) {
        multiDragClones.push(clone(multiDragElements[i]))
        multiDragClones[i].sortableIndex = multiDragElements[i].sortableIndex
        multiDragClones[i].draggable = false
        multiDragClones[i].style['will-change'] = ''
        toggleClass(multiDragClones[i], this.options.selectedClass, false)
        multiDragElements[i] === dragEl$1 &&
          toggleClass(multiDragClones[i], this.options.chosenClass, false)
      }

      sortable._hideClone()

      cancel()
    },
    clone: function clone(_ref3) {
      var sortable = _ref3.sortable,
        rootEl = _ref3.rootEl,
        dispatchSortableEvent = _ref3.dispatchSortableEvent,
        cancel = _ref3.cancel
      if (!this.isMultiDrag) return

      if (!this.options.removeCloneOnHide) {
        if (multiDragElements.length && multiDragSortable === sortable) {
          insertMultiDragClones(true, rootEl)
          dispatchSortableEvent('clone')
          cancel()
        }
      }
    },
    showClone: function showClone(_ref4) {
      var cloneNowShown = _ref4.cloneNowShown,
        rootEl = _ref4.rootEl,
        cancel = _ref4.cancel
      if (!this.isMultiDrag) return
      insertMultiDragClones(false, rootEl)
      multiDragClones.forEach(function (clone) {
        css(clone, 'display', '')
      })
      cloneNowShown()
      clonesHidden = false
      cancel()
    },
    hideClone: function hideClone(_ref5) {
      var _this = this

      var sortable = _ref5.sortable,
        cloneNowHidden = _ref5.cloneNowHidden,
        cancel = _ref5.cancel
      if (!this.isMultiDrag) return
      multiDragClones.forEach(function (clone) {
        css(clone, 'display', 'none')

        if (_this.options.removeCloneOnHide && clone.parentNode) {
          clone.parentNode.removeChild(clone)
        }
      })
      cloneNowHidden()
      clonesHidden = true
      cancel()
    },
    dragStartGlobal: function dragStartGlobal(_ref6) {
      var sortable = _ref6.sortable

      if (!this.isMultiDrag && multiDragSortable) {
        multiDragSortable.multiDrag._deselectMultiDrag()
      }

      multiDragElements.forEach(function (multiDragElement) {
        multiDragElement.sortableIndex = index(multiDragElement)
      }) // Sort multi-drag elements

      multiDragElements = multiDragElements.sort(function (a, b) {
        return a.sortableIndex - b.sortableIndex
      })
      dragStarted = true
    },
    dragStarted: function dragStarted(_ref7) {
      var _this2 = this

      var sortable = _ref7.sortable
      if (!this.isMultiDrag) return

      if (this.options.sort) {
        // Capture rects,
        // hide multi drag elements (by positioning them absolute),
        // set multi drag elements rects to dragRect,
        // show multi drag elements,
        // animate to rects,
        // unset rects & remove from DOM
        sortable.captureAnimationState()

        if (this.options.animation) {
          multiDragElements.forEach(function (multiDragElement) {
            if (multiDragElement === dragEl$1) return
            css(multiDragElement, 'position', 'absolute')
          })
          var dragRect = getRect(dragEl$1, false, true, true)
          multiDragElements.forEach(function (multiDragElement) {
            if (multiDragElement === dragEl$1) return
            setRect(multiDragElement, dragRect)
          })
          folding = true
          initialFolding = true
        }
      }

      sortable.animateAll(function () {
        folding = false
        initialFolding = false

        if (_this2.options.animation) {
          multiDragElements.forEach(function (multiDragElement) {
            unsetRect(multiDragElement)
          })
        } // Remove all auxiliary multidrag items from el, if sorting enabled

        if (_this2.options.sort) {
          removeMultiDragElements()
        }
      })
    },
    dragOver: function dragOver(_ref8) {
      var target = _ref8.target,
        completed = _ref8.completed,
        cancel = _ref8.cancel

      if (folding && ~multiDragElements.indexOf(target)) {
        completed(false)
        cancel()
      }
    },
    revert: function revert(_ref9) {
      var fromSortable = _ref9.fromSortable,
        rootEl = _ref9.rootEl,
        sortable = _ref9.sortable,
        dragRect = _ref9.dragRect

      if (multiDragElements.length > 1) {
        // Setup unfold animation
        multiDragElements.forEach(function (multiDragElement) {
          sortable.addAnimationState({
            target: multiDragElement,
            rect: folding ? getRect(multiDragElement) : dragRect,
          })
          unsetRect(multiDragElement)
          multiDragElement.fromRect = dragRect
          fromSortable.removeAnimationState(multiDragElement)
        })
        folding = false
        insertMultiDragElements(!this.options.removeCloneOnHide, rootEl)
      }
    },
    dragOverCompleted: function dragOverCompleted(_ref10) {
      var sortable = _ref10.sortable,
        isOwner = _ref10.isOwner,
        insertion = _ref10.insertion,
        activeSortable = _ref10.activeSortable,
        parentEl = _ref10.parentEl,
        putSortable = _ref10.putSortable
      var options = this.options

      if (insertion) {
        // Clones must be hidden before folding animation to capture dragRectAbsolute properly
        if (isOwner) {
          activeSortable._hideClone()
        }

        initialFolding = false // If leaving sort:false root, or already folding - Fold to new location

        if (
          options.animation &&
          multiDragElements.length > 1 &&
          (folding || (!isOwner && !activeSortable.options.sort && !putSortable))
        ) {
          // Fold: Set all multi drag elements's rects to dragEl's rect when multi-drag elements are invisible
          var dragRectAbsolute = getRect(dragEl$1, false, true, true)
          multiDragElements.forEach(function (multiDragElement) {
            if (multiDragElement === dragEl$1) return
            setRect(multiDragElement, dragRectAbsolute) // Move element(s) to end of parentEl so that it does not interfere with multi-drag clones insertion if they are inserted
            // while folding, and so that we can capture them again because old sortable will no longer be fromSortable

            parentEl.appendChild(multiDragElement)
          })
          folding = true
        } // Clones must be shown (and check to remove multi drags) after folding when interfering multiDragElements are moved out

        if (!isOwner) {
          // Only remove if not folding (folding will remove them anyways)
          if (!folding) {
            removeMultiDragElements()
          }

          if (multiDragElements.length > 1) {
            var clonesHiddenBefore = clonesHidden

            activeSortable._showClone(sortable) // Unfold animation for clones if showing from hidden

            if (activeSortable.options.animation && !clonesHidden && clonesHiddenBefore) {
              multiDragClones.forEach(function (clone) {
                activeSortable.addAnimationState({
                  target: clone,
                  rect: clonesFromRect,
                })
                clone.fromRect = clonesFromRect
                clone.thisAnimationDuration = null
              })
            }
          } else {
            activeSortable._showClone(sortable)
          }
        }
      }
    },
    dragOverAnimationCapture: function dragOverAnimationCapture(_ref11) {
      var dragRect = _ref11.dragRect,
        isOwner = _ref11.isOwner,
        activeSortable = _ref11.activeSortable
      multiDragElements.forEach(function (multiDragElement) {
        multiDragElement.thisAnimationDuration = null
      })

      if (activeSortable.options.animation && !isOwner && activeSortable.multiDrag.isMultiDrag) {
        clonesFromRect = _extends({}, dragRect)
        var dragMatrix = matrix(dragEl$1, true)
        clonesFromRect.top -= dragMatrix.f
        clonesFromRect.left -= dragMatrix.e
      }
    },
    dragOverAnimationComplete: function dragOverAnimationComplete() {
      if (folding) {
        folding = false
        removeMultiDragElements()
      }
    },
    drop: function drop(_ref12) {
      var evt = _ref12.originalEvent,
        rootEl = _ref12.rootEl,
        parentEl = _ref12.parentEl,
        sortable = _ref12.sortable,
        dispatchSortableEvent = _ref12.dispatchSortableEvent,
        oldIndex = _ref12.oldIndex,
        putSortable = _ref12.putSortable
      var toSortable = putSortable || this.sortable
      if (!evt) return
      var options = this.options,
        children = parentEl.children // Multi-drag selection

      if (!dragStarted) {
        if (options.multiDragKey && !this.multiDragKeyDown) {
          this._deselectMultiDrag()
        }

        toggleClass(dragEl$1, options.selectedClass, !~multiDragElements.indexOf(dragEl$1))

        if (!~multiDragElements.indexOf(dragEl$1)) {
          multiDragElements.push(dragEl$1)
          dispatchEvent({
            sortable: sortable,
            rootEl: rootEl,
            name: 'select',
            targetEl: dragEl$1,
            originalEvt: evt,
          }) // Modifier activated, select from last to dragEl

          if (evt.shiftKey && lastMultiDragSelect && sortable.el.contains(lastMultiDragSelect)) {
            var lastIndex = index(lastMultiDragSelect),
              currentIndex = index(dragEl$1)

            if (~lastIndex && ~currentIndex && lastIndex !== currentIndex) {
              // Must include lastMultiDragSelect (select it), in case modified selection from no selection
              // (but previous selection existed)
              var n, i

              if (currentIndex > lastIndex) {
                i = lastIndex
                n = currentIndex
              } else {
                i = currentIndex
                n = lastIndex + 1
              }

              for (; i < n; i++) {
                if (~multiDragElements.indexOf(children[i])) continue
                toggleClass(children[i], options.selectedClass, true)
                multiDragElements.push(children[i])
                dispatchEvent({
                  sortable: sortable,
                  rootEl: rootEl,
                  name: 'select',
                  targetEl: children[i],
                  originalEvt: evt,
                })
              }
            }
          } else {
            lastMultiDragSelect = dragEl$1
          }

          multiDragSortable = toSortable
        } else {
          multiDragElements.splice(multiDragElements.indexOf(dragEl$1), 1)
          lastMultiDragSelect = null
          dispatchEvent({
            sortable: sortable,
            rootEl: rootEl,
            name: 'deselect',
            targetEl: dragEl$1,
            originalEvt: evt,
          })
        }
      } // Multi-drag drop

      if (dragStarted && this.isMultiDrag) {
        // Do not "unfold" after around dragEl if reverted
        if (
          (parentEl[expando].options.sort || parentEl !== rootEl) &&
          multiDragElements.length > 1
        ) {
          var dragRect = getRect(dragEl$1),
            multiDragIndex = index(dragEl$1, ':not(.' + this.options.selectedClass + ')')
          if (!initialFolding && options.animation) dragEl$1.thisAnimationDuration = null
          toSortable.captureAnimationState()

          if (!initialFolding) {
            if (options.animation) {
              dragEl$1.fromRect = dragRect
              multiDragElements.forEach(function (multiDragElement) {
                multiDragElement.thisAnimationDuration = null

                if (multiDragElement !== dragEl$1) {
                  var rect = folding ? getRect(multiDragElement) : dragRect
                  multiDragElement.fromRect = rect // Prepare unfold animation

                  toSortable.addAnimationState({
                    target: multiDragElement,
                    rect: rect,
                  })
                }
              })
            } // Multi drag elements are not necessarily removed from the DOM on drop, so to reinsert
            // properly they must all be removed

            removeMultiDragElements()
            multiDragElements.forEach(function (multiDragElement) {
              if (children[multiDragIndex]) {
                parentEl.insertBefore(multiDragElement, children[multiDragIndex])
              } else {
                parentEl.appendChild(multiDragElement)
              }

              multiDragIndex++
            }) // If initial folding is done, the elements may have changed position because they are now
            // unfolding around dragEl, even though dragEl may not have his index changed, so update event
            // must be fired here as Sortable will not.

            if (oldIndex === index(dragEl$1)) {
              var update = false
              multiDragElements.forEach(function (multiDragElement) {
                if (multiDragElement.sortableIndex !== index(multiDragElement)) {
                  update = true
                  return
                }
              })

              if (update) {
                dispatchSortableEvent('update')
              }
            }
          } // Must be done after capturing individual rects (scroll bar)

          multiDragElements.forEach(function (multiDragElement) {
            unsetRect(multiDragElement)
          })
          toSortable.animateAll()
        }

        multiDragSortable = toSortable
      } // Remove clones if necessary

      if (rootEl === parentEl || (putSortable && putSortable.lastPutMode !== 'clone')) {
        multiDragClones.forEach(function (clone) {
          clone.parentNode && clone.parentNode.removeChild(clone)
        })
      }
    },
    nullingGlobal: function nullingGlobal() {
      this.isMultiDrag = dragStarted = false
      multiDragClones.length = 0
    },
    destroyGlobal: function destroyGlobal() {
      this._deselectMultiDrag()

      off(document, 'pointerup', this._deselectMultiDrag)
      off(document, 'mouseup', this._deselectMultiDrag)
      off(document, 'touchend', this._deselectMultiDrag)
      off(document, 'keydown', this._checkKeyDown)
      off(document, 'keyup', this._checkKeyUp)
    },
    _deselectMultiDrag: function _deselectMultiDrag(evt) {
      if (typeof dragStarted !== 'undefined' && dragStarted) return // Only deselect if selection is in this sortable

      if (multiDragSortable !== this.sortable) return // Only deselect if target is not item in this sortable

      if (evt && closest(evt.target, this.options.draggable, this.sortable.el, false)) return // Only deselect if left click

      if (evt && evt.button !== 0) return

      while (multiDragElements.length) {
        var el = multiDragElements[0]
        toggleClass(el, this.options.selectedClass, false)
        multiDragElements.shift()
        dispatchEvent({
          sortable: this.sortable,
          rootEl: this.sortable.el,
          name: 'deselect',
          targetEl: el,
          originalEvt: evt,
        })
      }
    },
    _checkKeyDown: function _checkKeyDown(evt) {
      if (evt.key === this.options.multiDragKey) {
        this.multiDragKeyDown = true
      }
    },
    _checkKeyUp: function _checkKeyUp(evt) {
      if (evt.key === this.options.multiDragKey) {
        this.multiDragKeyDown = false
      }
    },
  }
  return _extends(MultiDrag, {
    // Static methods & properties
    pluginName: 'multiDrag',
    utils: {
      /**
       * Selects the provided multi-drag item
       * @param  {HTMLElement} el    The element to be selected
       */
      select: function select(el) {
        var sortable = el.parentNode[expando]
        if (!sortable || !sortable.options.multiDrag || ~multiDragElements.indexOf(el)) return

        if (multiDragSortable && multiDragSortable !== sortable) {
          multiDragSortable.multiDrag._deselectMultiDrag()

          multiDragSortable = sortable
        }

        toggleClass(el, sortable.options.selectedClass, true)
        multiDragElements.push(el)
      },

      /**
       * Deselects the provided multi-drag item
       * @param  {HTMLElement} el    The element to be deselected
       */
      deselect: function deselect(el) {
        var sortable = el.parentNode[expando],
          index = multiDragElements.indexOf(el)
        if (!sortable || !sortable.options.multiDrag || !~index) return
        toggleClass(el, sortable.options.selectedClass, false)
        multiDragElements.splice(index, 1)
      },
    },
    eventProperties: function eventProperties() {
      var _this3 = this

      var oldIndicies = [],
        newIndicies = []
      multiDragElements.forEach(function (multiDragElement) {
        oldIndicies.push({
          multiDragElement: multiDragElement,
          index: multiDragElement.sortableIndex,
        }) // multiDragElements will already be sorted if folding

        var newIndex

        if (folding && multiDragElement !== dragEl$1) {
          newIndex = -1
        } else if (folding) {
          newIndex = index(multiDragElement, ':not(.' + _this3.options.selectedClass + ')')
        } else {
          newIndex = index(multiDragElement)
        }

        newIndicies.push({
          multiDragElement: multiDragElement,
          index: newIndex,
        })
      })
      return {
        items: _toConsumableArray(multiDragElements),
        clones: [].concat(multiDragClones),
        oldIndicies: oldIndicies,
        newIndicies: newIndicies,
      }
    },
    optionListeners: {
      multiDragKey: function multiDragKey(key) {
        key = key.toLowerCase()

        if (key === 'ctrl') {
          key = 'Control'
        } else if (key.length > 1) {
          key = key.charAt(0).toUpperCase() + key.substr(1)
        }

        return key
      },
    },
  })
}

function insertMultiDragElements(clonesInserted, rootEl) {
  multiDragElements.forEach(function (multiDragElement, i) {
    var target = rootEl.children[multiDragElement.sortableIndex + (clonesInserted ? Number(i) : 0)]

    if (target) {
      rootEl.insertBefore(multiDragElement, target)
    } else {
      rootEl.appendChild(multiDragElement)
    }
  })
}
/**
 * Insert multi-drag clones
 * @param  {[Boolean]} elementsInserted  Whether the multi-drag elements are inserted
 * @param  {HTMLElement} rootEl
 */

function insertMultiDragClones(elementsInserted, rootEl) {
  multiDragClones.forEach(function (clone, i) {
    var target = rootEl.children[clone.sortableIndex + (elementsInserted ? Number(i) : 0)]

    if (target) {
      rootEl.insertBefore(clone, target)
    } else {
      rootEl.appendChild(clone)
    }
  })
}

function removeMultiDragElements() {
  multiDragElements.forEach(function (multiDragElement) {
    if (multiDragElement === dragEl$1) return
    multiDragElement.parentNode && multiDragElement.parentNode.removeChild(multiDragElement)
  })
}

export default Sortable
export {
  AutoScrollPlugin as AutoScroll,
  MultiDragPlugin as MultiDrag,
  OnSpill,
  Sortable,
  SwapPlugin as Swap,
}
